21971664
21,971,664 is an even composite number composed of five prime numbers multiplied together.
21971664 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred eighty divisors.
Prime factorization of 21971664:
24 × 32 × 112 × 13 × 97
(2 × 2 × 2 × 2 × 3 × 3 × 11 × 11 × 13 × 97)See below for interesting mathematical facts about the number 21971664 from the Numbermatics database.
Names of 21971664
- Cardinal: 21971664 can be written as Twenty-one million, nine hundred seventy-one thousand, six hundred sixty-four.
Scientific notation
- Scientific notation: 2.1971664 × 107
Factors of 21971664
Divisors of 21971664
- Number of divisors d(n): 180
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Complete list of divisors:
1 2 3 4 6 8 9 11 12 13 16 18 22 24 26 33 36 39 44 48 52 66 72 78 88 97 99 104 117 121 132 143 144 156 176 194 198 208 234 242 264 286 291 312 363 388 396 429 468 484 528 572 582 624 726 776 792 858 873 936 968 1067 1089 1144 1164 1261 1287 1452 1552 1573 1584 1716 1746 1872 1936 2134 2178 2288 2328 2522 2574 2904 3146 3201 3432 3492 3783 4268 4356 4656 4719 5044 5148 5808 6292 6402 6864 6984 7566 8536 8712 9438 9603 10088 10296 11349 11737 12584 12804 13871 13968 14157 15132 17072 17424 18876 19206 20176 20592 22698 23474 25168 25608 27742 28314 30264 35211 37752 38412 41613 45396 46948 51216 55484 56628 60528 70422 75504 76824 83226 90792 93896 105633 110968 113256 124839 140844 152581 153648 166452 181584 187792 211266 221936 226512 249678 281688 305162 332904 422532 457743 499356 563376 610324 665808 845064 915486 998712 1220648 1373229 1690128 1830972 1997424 2441296 2746458 3661944 5492916 7323888 10985832 21971664
- Sum of all divisors σ(n): 73537828
- Sum of proper divisors (its aliquot sum) s(n): 51566164
- 21971664 is an abundant number, because the sum of its proper divisors (51566164) is greater than itself. Its abundance is 29594500
Bases of 21971664
- Binary: 10100111101000010110100002
- Hexadecimal: 0x14F42D0
- Base-36: D2XG0
Squares and roots of 21971664
- 21971664 squared (219716642) is 482754018928896
- 21971664 cubed (219716643) is 10606909098555342802944
-
The
square root of 21971664 is 4687.3941588051 -
The
cube root of 21971664 is 280.0835804907
Scales and comparisons
How big is 21971664?- 21,971,664 seconds is equal to 36 weeks, 2 days, 7 hours, 14 minutes, 24 seconds.
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To count from 1 to 21,971,664 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 21971664 cubic inches would be around 23.3 feet tall.
Recreational maths with 21971664
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