81831321
81,831,321 is an odd composite number composed of five prime numbers multiplied together.
81831321 is an odd composite number. It is composed of five distinct prime numbers multiplied together. It has a total of seventy-two divisors.
Prime factorization of 81831321:
32 × 11 × 132 × 67 × 73
(3 × 3 × 11 × 13 × 13 × 67 × 73)See below for interesting mathematical facts about the number 81831321 from the Numbermatics database.
Names of 81831321
- Cardinal: 81831321 can be written as Eighty-one million, eight hundred thirty-one thousand, three hundred twenty-one.
Scientific notation
- Scientific notation: 8.1831321 × 107
Factors of 81831321
Divisors of 81831321
- Number of divisors d(n): 72
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Complete list of divisors:
1 3 9 11 13 33 39 67 73 99 117 143 169 201 219 429 507 603 657 737 803 871 949 1287 1521 1859 2211 2409 2613 2847 4891 5577 6633 7227 7839 8541 9581 10439 11323 12337 14673 16731 28743 31317 33969 37011 44019 53801 63583 86229 93951 101907 111033 124553 135707 161403 190749 373659 407121 484209 572247 699413 826579 1120977 1221363 2098239 2479737 6294717 7439211 9092369 27277107 81831321
- Sum of all divisors σ(n): 143653536
- Sum of proper divisors (its aliquot sum) s(n): 61822215
- 81831321 is a deficient number, because the sum of its proper divisors (61822215) is less than itself. Its deficiency is 20009106
Bases of 81831321
- Binary: 1001110000010100101100110012
- Hexadecimal: 0x4E0A599
- Base-36: 1CPXG9
Squares and roots of 81831321
- 81831321 squared (818313212) is 6696365096605041
- 81831321 cubed (818313213) is 547972401753483120289161
-
The
square root of 81831321 is 9046.0666037787 -
The
cube root of 81831321 is 434.1500486361
Scales and comparisons
How big is 81831321?- 81,831,321 seconds is equal to 2 years, 31 weeks, 2 days, 2 hours, 55 minutes, 21 seconds.
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To count from 1 to 81,831,321 would take you about three years!
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 81831321 cubic inches would be around 36.2 feet tall.
Recreational maths with 81831321
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The information we have on file for 81831321 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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