21855120
21,855,120 is an even composite number composed of five prime numbers multiplied together.
21855120 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of eighty divisors.
Prime factorization of 21855120:
24 × 3 × 5 × 7 × 13009
(2 × 2 × 2 × 2 × 3 × 5 × 7 × 13009)See below for interesting mathematical facts about the number 21855120 from the Numbermatics database.
Names of 21855120
- Cardinal: 21855120 can be written as Twenty-one million, eight hundred fifty-five thousand, one hundred twenty.
Scientific notation
- Scientific notation: 2.185512 × 107
Factors of 21855120
Divisors of 21855120
- Number of divisors d(n): 80
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Complete list of divisors:
1 2 3 4 5 6 7 8 10 12 14 15 16 20 21 24 28 30 35 40 42 48 56 60 70 80 84 105 112 120 140 168 210 240 280 336 420 560 840 1680 13009 26018 39027 52036 65045 78054 91063 104072 130090 156108 182126 195135 208144 260180 273189 312216 364252 390270 455315 520360 546378 624432 728504 780540 910630 1040720 1092756 1365945 1457008 1561080 1821260 2185512 2731890 3122160 3642520 4371024 5463780 7285040 10927560 21855120
- Sum of all divisors σ(n): 77435520
- Sum of proper divisors (its aliquot sum) s(n): 55580400
- 21855120 is an abundant number, because the sum of its proper divisors (55580400) is greater than itself. Its abundance is 33725280
Bases of 21855120
- Binary: 10100110101111011100100002
- Hexadecimal: 0x14D7B90
- Base-36: D0FIO
Squares and roots of 21855120
- 21855120 squared (218551202) is 477646270214400
- 21855120 cubed (218551203) is 10439016553088137728000
-
The
square root of 21855120 is 4674.9459889929 -
The
cube root of 21855120 is 279.5874877997
Scales and comparisons
How big is 21855120?- 21,855,120 seconds is equal to 36 weeks, 22 hours, 52 minutes.
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To count from 1 to 21,855,120 would take you about two weeks!
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 21855120 cubic inches would be around 23.3 feet tall.
Recreational maths with 21855120
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The information we have on file for 21855120 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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