21159985
21,159,985 is an odd composite number composed of six prime numbers multiplied together.
21159985 is an odd composite number. It is composed of six distinct prime numbers multiplied together. It has a total of sixty-four divisors.
Prime factorization of 21159985:
5 × 7 × 11 × 17 × 53 × 61
See below for interesting mathematical facts about the number 21159985 from the Numbermatics database.
Names of 21159985
- Cardinal: 21159985 can be written as Twenty-one million, one hundred fifty-nine thousand, nine hundred eighty-five.
Scientific notation
- Scientific notation: 2.1159985 × 107
Factors of 21159985
Divisors of 21159985
- Number of divisors d(n): 64
-
Complete list of divisors:
1 5 7 11 17 35 53 55 61 77 85 119 187 265 305 371 385 427 583 595 671 901 935 1037 1309 1855 2135 2915 3233 3355 4081 4505 4697 5185 6307 6545 7259 9911 11407 16165 20405 22631 23485 31535 35563 36295 49555 54961 57035 69377 79849 113155 177815 248941 274805 346885 384727 399245 604571 1244705 1923635 3022855 4231997 21159985
- Sum of all divisors σ(n): 34712064
- Sum of proper divisors (its aliquot sum) s(n): 13552079
- 21159985 is a deficient number, because the sum of its proper divisors (13552079) is less than itself. Its deficiency is 7607906
Bases of 21159985
- Binary: 10100001011100000001100012
- Hexadecimal: 0x142E031
- Base-36: CLJ5D
Squares and roots of 21159985
- 21159985 squared (211599852) is 447744965200225
- 21159985 cubed (211599853) is 9474276747462282996625
-
The
square root of 21159985 is 4599.9983695649 -
The
cube root of 21159985 is 276.5912594285
Scales and comparisons
How big is 21159985?- 21,159,985 seconds is equal to 34 weeks, 6 days, 21 hours, 46 minutes, 25 seconds.
-
To count from 1 to 21,159,985 would take you about three 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 21159985 cubic inches would be around 23 feet tall.
Recreational maths with 21159985
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The information we have on file for 21159985 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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