21316721

21,316,721 is a prime number. Like all primes greater than two, it is odd and has no factors apart from itself and one.

What does the number 21316721 look like?

As a prime, it is not composed of any other numbers and has no internal structure.

21316721 is a prime number. Like all primes (except two), it is an odd number.

Prime factorization of 21316721:

21316721

See below for interesting mathematical facts about the number 21316721 from the Numbermatics database.

Names of 21316721

Cardinal: 21316721 can be written as Twenty-one million, three hundred sixteen thousand, seven hundred twenty-one.

Scientific notation

Scientific notation: 2.1316721 × 10⁷

Factors of 21316721

Number of distinct prime factors ω(n): 1
Total number of prime factors Ω(n): 1
Sum of prime factors: 21316721

Divisors of 21316721

Number of divisors d(n): 2
Complete list of divisors:
1 21316721
Sum of all divisors σ(n): 21316722
Sum of proper divisors (its aliquot sum) s(n): 1
21316721 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 21316720

Bases of 21316721

Binary: 1010001010100010001110001₂
Hexadecimal: 0x1454471
Base-36: COW35

Squares and roots of 21316721

21316721 squared (21316721²) is 454402594191841
21316721 cubed (21316721³) is 9686373322063695073361
The square root of 21316721 is 4617.0034654525
The cube root of 21316721 is 277.2725013671

Scales and comparisons

How big is 21316721?

21,316,721 seconds is equal to 35 weeks, 1 day, 17 hours, 18 minutes, 41 seconds.
To count from 1 to 21,316,721 would take you about six days!

This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)
A cube with a volume of 21316721 cubic inches would be around 23.1 feet tall.

Recreational maths with 21316721

21316721 backwards is 12761312
21316721 is a twin prime! Its twin is 21316723
The number of decimal digits it has is: 8
The sum of 21316721's digits is 23
More coming soon!

Copy this link to share with anyone:

Share this page on social media:

Link to this page

HTML: To link to this page, just copy and paste the link below into your blog, web page or email.

<a href="https://numbermatics.com/n/21316721/?utm_source=shared">Number 21316721 - Facts about the integer</a>

BBCODE: To link to this page in a forum post or comment box, just copy and paste the link code below:

[url=https://numbermatics.com/n/21316721/?utm_source=shared]Number 21316721 - Facts about the integer[/url]

Cite this page

MLA style:
"Number 21316721 - Facts about the integer". Numbermatics.com. 2024. Web. 2 May 2024.

APA style:
Numbermatics. (2024). Number 21316721 - Facts about the integer. Retrieved 2 May 2024, from https://numbermatics.com/n/21316721/

Chicago style:
Numbermatics. 2024. "Number 21316721 - Facts about the integer". https://numbermatics.com/n/21316721/

The information we have on file for 21316721 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!

Keywords: Divisors of 21316721, math, Factors of 21316721, curriculum, school, college, exams, university, Prime factorization of 21316721, STEM, science, technology, engineering, physics, economics, calculator, twenty-one million, three hundred sixteen thousand, seven hundred twenty-one.