81317120
81,317,120 is an even composite number composed of five prime numbers multiplied together.
81317120 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred forty-four divisors.
Prime factorization of 81317120:
28 × 5 × 17 × 37 × 101
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 5 × 17 × 37 × 101)See below for interesting mathematical facts about the number 81317120 from the Numbermatics database.
Names of 81317120
- Cardinal: 81317120 can be written as Eighty-one million, three hundred seventeen thousand, one hundred twenty.
Scientific notation
- Scientific notation: 8.131712 × 107
Factors of 81317120
Divisors of 81317120
- Number of divisors d(n): 144
-
Complete list of divisors:
1 2 4 5 8 10 16 17 20 32 34 37 40 64 68 74 80 85 101 128 136 148 160 170 185 202 256 272 296 320 340 370 404 505 544 592 629 640 680 740 808 1010 1088 1184 1258 1280 1360 1480 1616 1717 2020 2176 2368 2516 2720 2960 3145 3232 3434 3737 4040 4352 4736 5032 5440 5920 6290 6464 6868 7474 8080 8585 9472 10064 10880 11840 12580 12928 13736 14948 16160 17170 18685 20128 21760 23680 25160 25856 27472 29896 32320 34340 37370 40256 47360 50320 54944 59792 63529 64640 68680 74740 80512 100640 109888 119584 127058 129280 137360 149480 161024 201280 219776 239168 254116 274720 298960 317645 402560 439552 478336 508232 549440 597920 635290 805120 956672 1016464 1098880 1195840 1270580 2032928 2197760 2391680 2541160 4065856 4783360 5082320 8131712 10164640 16263424 20329280 40658560 81317120
- Sum of all divisors σ(n): 213908688
- Sum of proper divisors (its aliquot sum) s(n): 132591568
- 81317120 is an abundant number, because the sum of its proper divisors (132591568) is greater than itself. Its abundance is 51274448
Bases of 81317120
- Binary: 1001101100011001101000000002
- Hexadecimal: 0x4D8CD00
- Base-36: 1CEWOW
Squares and roots of 81317120
- 81317120 squared (813171202) is 6612474005094400
- 81317120 cubed (813171203) is 537707342169141936128000
-
The
square root of 81317120 is 9017.6005677785 -
The
cube root of 81317120 is 433.2387854209
Scales and comparisons
How big is 81317120?- 81,317,120 seconds is equal to 2 years, 30 weeks, 3 days, 4 hours, 5 minutes, 20 seconds.
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To count from 1 to 81,317,120 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 81317120 cubic inches would be around 36.1 feet tall.
Recreational maths with 81317120
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