81221688
81,221,688 is an even composite number composed of five prime numbers multiplied together.
81221688 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 81221688:
23 × 32 × 67 × 113 × 149
(2 × 2 × 2 × 3 × 3 × 67 × 113 × 149)See below for interesting mathematical facts about the number 81221688 from the Numbermatics database.
Names of 81221688
- Cardinal: 81221688 can be written as Eighty-one million, two hundred twenty-one thousand, six hundred eighty-eight.
Scientific notation
- Scientific notation: 8.1221688 × 107
Factors of 81221688
Divisors of 81221688
- Number of divisors d(n): 96
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Complete list of divisors:
1 2 3 4 6 8 9 12 18 24 36 67 72 113 134 149 201 226 268 298 339 402 447 452 536 596 603 678 804 894 904 1017 1192 1206 1341 1356 1608 1788 2034 2412 2682 2712 3576 4068 4824 5364 7571 8136 9983 10728 15142 16837 19966 22713 29949 30284 33674 39932 45426 50511 59898 60568 67348 68139 79864 89847 90852 101022 119796 134696 136278 151533 179694 181704 202044 239592 272556 303066 359388 404088 545112 606132 718776 1128079 1212264 2256158 3384237 4512316 6768474 9024632 10152711 13536948 20305422 27073896 40610844 81221688
- Sum of all divisors σ(n): 226746000
- Sum of proper divisors (its aliquot sum) s(n): 145524312
- 81221688 is an abundant number, because the sum of its proper divisors (145524312) is greater than itself. Its abundance is 64302624
Bases of 81221688
- Binary: 1001101011101011000001110002
- Hexadecimal: 0x4D75838
- Base-36: 1CCV20
Squares and roots of 81221688
- 81221688 squared (812216882) is 6596962601569344
- 81221688 cubed (812216883) is 535816438172333568732672
-
The
square root of 81221688 is 9012.3075846311 -
The
cube root of 81221688 is 433.0692392125
Scales and comparisons
How big is 81221688?- 81,221,688 seconds is equal to 2 years, 30 weeks, 2 days, 1 hour, 34 minutes, 48 seconds.
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To count from 1 to 81,221,688 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 81221688 cubic inches would be around 36.1 feet tall.
Recreational maths with 81221688
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The information we have on file for 81221688 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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