217 is an odd composite number composed of two prime numbers multiplied together.

What does the number 217 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 4 divisors.

217 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of four divisors.

Prime factorization of 217:

7 × 31

See below for interesting mathematical facts about the number 217 from the Numbermatics database.

Names of 217

  • Cardinal: 217 can be written as Two hundred seventeen.

Scientific notation

  • Scientific notation: 2.17 × 102

Factors of 217

  • Number of distinct prime factors ω(n): 2
  • Total number of prime factors Ω(n): 2
  • Sum of prime factors: 38

Divisors of 217

  • Number of divisors d(n): 4
  • Complete list of divisors:
    1 7 31 217
  • Sum of all divisors σ(n): 256
  • Sum of proper divisors (its aliquot sum) s(n): 39
  • 217 is a deficient number, because the sum of its proper divisors (39) is less than itself. Its deficiency is 178

Bases of 217

  • Binary: 110110012
  • Hexadecimal: 0xD9
  • Base-36: 61

Squares and roots of 217

  • 217 squared (2172) is 47089
  • 217 cubed (2173) is 10218313
  • The square root of 217 is 14.7309198627
  • The cube root of 217 is 6.0092450069

Scales and comparisons

How big is 217?
  • 217 seconds is equal to 3 minutes, 37 seconds.
  • To count from 1 to 217 would take you about forty-eight seconds.

    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 217 cubic inches would be around 0.5 feet tall.

Recreational maths with 217

  • 217 backwards is 712
  • The number of decimal digits it has is: 3
  • The sum of 217's digits is 10
  • 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.

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

Cite this page

MLA style:
"Number 217 - Facts about the integer". Numbermatics.com. 2024. Web. 15 June 2024.

APA style:
Numbermatics. (2024). Number 217 - Facts about the integer. Retrieved 15 June 2024, from https://numbermatics.com/n/217/

Chicago style:
Numbermatics. 2024. "Number 217 - Facts about the integer". https://numbermatics.com/n/217/

The information we have on file for 217 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 217, math, Factors of 217, curriculum, school, college, exams, university, Prime factorization of 217, STEM, science, technology, engineering, physics, economics, calculator, two hundred seventeen.

Oh no. Javascript is switched off in your browser.
Some bits of this website may not work unless you switch it on.