21315931

21,315,931 is an odd composite number composed of four prime numbers multiplied together.

What does the number 21315931 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 24 divisors.

21315931 is an odd composite number. It is composed of four distinct prime numbers multiplied together. It has a total of twenty-four divisors.

Prime factorization of 21315931:

7² × 13 × 109 × 307

(7 × 7 × 13 × 109 × 307)

See below for interesting mathematical facts about the number 21315931 from the Numbermatics database.

Names of 21315931

Cardinal: 21315931 can be written as Twenty-one million, three hundred fifteen thousand, nine hundred thirty-one.

Scientific notation

Scientific notation: 2.1315931 × 10⁷

Factors of 21315931

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 5
Sum of prime factors: 436

Divisors of 21315931

Number of divisors d(n): 24
Complete list of divisors:
1 7 13 49 91 109 307 637 763 1417 2149 3991 5341 9919 15043 27937 33463 69433 195559 234241 435019 1639687 3045133 21315931
Sum of all divisors σ(n): 27036240
Sum of proper divisors (its aliquot sum) s(n): 5720309
21315931 is a deficient number, because the sum of its proper divisors (5720309) is less than itself. Its deficiency is 15595622

Bases of 21315931

Binary: 1010001010100000101011011₂
Hexadecimal: 0x145415B
Base-36: COVH7

Squares and roots of 21315931

21315931 squared (21315931²) is 454368914396761
21315931 cubed (21315931³) is 9685296427826264099491
The square root of 21315931 is 4616.9179113343
The cube root of 21315931 is 277.2690760751

Scales and comparisons

How big is 21315931?

21,315,931 seconds is equal to 35 weeks, 1 day, 17 hours, 5 minutes, 31 seconds.
To count from 1 to 21,315,931 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 21315931 cubic inches would be around 23.1 feet tall.

Recreational maths with 21315931

21315931 backwards is 13951312
The number of decimal digits it has is: 8
The sum of 21315931's digits is 25
More coming soon!

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The information we have on file for 21315931 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!

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