21451220
21,451,220 is an even composite number composed of five prime numbers multiplied together.
21451220 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of ninety-six divisors.
Prime factorization of 21451220:
22 × 5 × 73 × 53 × 59
(2 × 2 × 5 × 7 × 7 × 7 × 53 × 59)See below for interesting mathematical facts about the number 21451220 from the Numbermatics database.
Names of 21451220
- Cardinal: 21451220 can be written as Twenty-one million, four hundred fifty-one thousand, two hundred twenty.
Scientific notation
- Scientific notation: 2.145122 × 107
Factors of 21451220
Divisors of 21451220
- Number of divisors d(n): 96
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Complete list of divisors:
1 2 4 5 7 10 14 20 28 35 49 53 59 70 98 106 118 140 196 212 236 245 265 295 343 371 413 490 530 590 686 742 826 980 1060 1180 1372 1484 1652 1715 1855 2065 2597 2891 3127 3430 3710 4130 5194 5782 6254 6860 7420 8260 10388 11564 12508 12985 14455 15635 18179 20237 21889 25970 28910 31270 36358 40474 43778 51940 57820 62540 72716 80948 87556 90895 101185 109445 153223 181790 202370 218890 306446 363580 404740 437780 612892 766115 1072561 1532230 2145122 3064460 4290244 5362805 10725610 21451220
- Sum of all divisors σ(n): 54432000
- Sum of proper divisors (its aliquot sum) s(n): 32980780
- 21451220 is an abundant number, because the sum of its proper divisors (32980780) is greater than itself. Its abundance is 11529560
Bases of 21451220
- Binary: 10100011101010001110101002
- Hexadecimal: 0x14751D4
- Base-36: CRRV8
Squares and roots of 21451220
- 21451220 squared (214512202) is 460154839488400
- 21451220 cubed (214512203) is 9870882695930355848000
-
The
square root of 21451220 is 4631.5461781137 -
The
cube root of 21451220 is 277.8544344289
Scales and comparisons
How big is 21451220?- 21,451,220 seconds is equal to 35 weeks, 3 days, 6 hours, 40 minutes, 20 seconds.
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To count from 1 to 21,451,220 would take you about ten hours!
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 21451220 cubic inches would be around 23.2 feet tall.
Recreational maths with 21451220
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The information we have on file for 21451220 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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