21255390
21,255,390 is an even composite number composed of six prime numbers multiplied together.
21255390 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of ninety-six divisors.
Prime factorization of 21255390:
2 × 32 × 5 × 13 × 37 × 491
(2 × 3 × 3 × 5 × 13 × 37 × 491)See below for interesting mathematical facts about the number 21255390 from the Numbermatics database.
Names of 21255390
- Cardinal: 21255390 can be written as Twenty-one million, two hundred fifty-five thousand, three hundred ninety.
Scientific notation
- Scientific notation: 2.125539 × 107
Factors of 21255390
Divisors of 21255390
- Number of divisors d(n): 96
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Complete list of divisors:
1 2 3 5 6 9 10 13 15 18 26 30 37 39 45 65 74 78 90 111 117 130 185 195 222 234 333 370 390 481 491 555 585 666 962 982 1110 1170 1443 1473 1665 2405 2455 2886 2946 3330 4329 4419 4810 4910 6383 7215 7365 8658 8838 12766 14430 14730 18167 19149 21645 22095 31915 36334 38298 43290 44190 54501 57447 63830 90835 95745 109002 114894 163503 181670 191490 236171 272505 287235 327006 472342 545010 574470 708513 817515 1180855 1417026 1635030 2125539 2361710 3542565 4251078 7085130 10627695 21255390
- Sum of all divisors σ(n): 61248096
- Sum of proper divisors (its aliquot sum) s(n): 39992706
- 21255390 is an abundant number, because the sum of its proper divisors (39992706) is greater than itself. Its abundance is 18737316
Bases of 21255390
- Binary: 10100010001010100110111102
- Hexadecimal: 0x14454DE
- Base-36: CNKRI
Squares and roots of 21255390
- 21255390 squared (212553902) is 451791604052100
- 21255390 cubed (212553903) is 9603006742852965819000
-
The
square root of 21255390 is 4610.3568191627 -
The
cube root of 21255390 is 277.0063294919
Scales and comparisons
How big is 21255390?- 21,255,390 seconds is equal to 35 weeks, 1 day, 16 minutes, 30 seconds.
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To count from 1 to 21,255,390 would take you about five 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 21255390 cubic inches would be around 23.1 feet tall.
Recreational maths with 21255390
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The information we have on file for 21255390 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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