21215997

21,215,997 is an odd composite number composed of four prime numbers multiplied together.

What does the number 21215997 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 36 divisors.

21215997 is an odd composite number. It is composed of four distinct prime numbers multiplied together. It has a total of thirty-six divisors.

Prime factorization of 21215997:

3² × 11 × 31² × 223

(3 × 3 × 11 × 31 × 31 × 223)

See below for interesting mathematical facts about the number 21215997 from the Numbermatics database.

Names of 21215997

Cardinal: 21215997 can be written as Twenty-one million, two hundred fifteen thousand, nine hundred ninety-seven.

Scientific notation

Scientific notation: 2.1215997 × 10⁷

Factors of 21215997

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 6
Sum of prime factors: 268

Divisors of 21215997

Number of divisors d(n): 36
Complete list of divisors:
1 3 9 11 31 33 93 99 223 279 341 669 961 1023 2007 2453 2883 3069 6913 7359 8649 10571 20739 22077 31713 62217 76043 95139 214303 228129 642909 684387 1928727 2357333 7071999 21215997
Sum of all divisors σ(n): 34699392
Sum of proper divisors (its aliquot sum) s(n): 13483395
21215997 is a deficient number, because the sum of its proper divisors (13483395) is less than itself. Its deficiency is 7732602

Bases of 21215997

Binary: 1010000111011101011111101₂
Hexadecimal: 0x143BAFD
Base-36: CMQD9

Squares and roots of 21215997

21215997 squared (21215997²) is 450118528704009
21215997 cubed (21215997³) is 9549713354628668831973
The square root of 21215997 is 4606.0826088987
The cube root of 21215997 is 276.8350967127

Scales and comparisons

How big is 21215997?

21,215,997 seconds is equal to 35 weeks, 13 hours, 19 minutes, 57 seconds.
To count from 1 to 21,215,997 would take you about four 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 21215997 cubic inches would be around 23.1 feet tall.

Recreational maths with 21215997

21215997 backwards is 79951212
The number of decimal digits it has is: 8
The sum of 21215997's digits is 36
More coming soon!

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The information we have on file for 21215997 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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