21215970
21,215,970 is an even composite number composed of five prime numbers multiplied together.
21215970 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of seventy-two divisors.
Prime factorization of 21215970:
2 × 32 × 5 × 192 × 653
(2 × 3 × 3 × 5 × 19 × 19 × 653)See below for interesting mathematical facts about the number 21215970 from the Numbermatics database.
Names of 21215970
- Cardinal: 21215970 can be written as Twenty-one million, two hundred fifteen thousand, nine hundred seventy.
Scientific notation
- Scientific notation: 2.121597 × 107
Factors of 21215970
Divisors of 21215970
- Number of divisors d(n): 72
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Complete list of divisors:
1 2 3 5 6 9 10 15 18 19 30 38 45 57 90 95 114 171 190 285 342 361 570 653 722 855 1083 1306 1710 1805 1959 2166 3249 3265 3610 3918 5415 5877 6498 6530 9795 10830 11754 12407 16245 19590 24814 29385 32490 37221 58770 62035 74442 111663 124070 186105 223326 235733 372210 471466 558315 707199 1116630 1178665 1414398 2121597 2357330 3535995 4243194 7071990 10607985 21215970
- Sum of all divisors σ(n): 58306716
- Sum of proper divisors (its aliquot sum) s(n): 37090746
- 21215970 is an abundant number, because the sum of its proper divisors (37090746) is greater than itself. Its abundance is 15874776
Bases of 21215970
- Binary: 10100001110111010111000102
- Hexadecimal: 0x143BAE2
- Base-36: CMQCI
Squares and roots of 21215970
- 21215970 squared (212159702) is 450117383040900
- 21215970 cubed (212159703) is 9549676895074243173000
-
The
square root of 21215970 is 4606.0796779909 -
The
cube root of 21215970 is 276.8349792771
Scales and comparisons
How big is 21215970?- 21,215,970 seconds is equal to 35 weeks, 13 hours, 19 minutes, 30 seconds.
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To count from 1 to 21,215,970 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 21215970 cubic inches would be around 23.1 feet tall.
Recreational maths with 21215970
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The information we have on file for 21215970 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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