81207216
81,207,216 is an even composite number composed of five prime numbers multiplied together.
81207216 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred twenty divisors.
Prime factorization of 81207216:
24 × 32 × 19 × 67 × 443
(2 × 2 × 2 × 2 × 3 × 3 × 19 × 67 × 443)See below for interesting mathematical facts about the number 81207216 from the Numbermatics database.
Names of 81207216
- Cardinal: 81207216 can be written as Eighty-one million, two hundred seven thousand, two hundred sixteen.
Scientific notation
- Scientific notation: 8.1207216 × 107
Factors of 81207216
Divisors of 81207216
- Number of divisors d(n): 120
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Complete list of divisors:
1 2 3 4 6 8 9 12 16 18 19 24 36 38 48 57 67 72 76 114 134 144 152 171 201 228 268 304 342 402 443 456 536 603 684 804 886 912 1072 1206 1273 1329 1368 1608 1772 2412 2546 2658 2736 3216 3544 3819 3987 4824 5092 5316 7088 7638 7974 8417 9648 10184 10632 11457 15276 15948 16834 20368 21264 22914 25251 29681 30552 31896 33668 45828 50502 59362 61104 63792 67336 75753 89043 91656 101004 118724 134672 151506 178086 183312 202008 237448 267129 303012 356172 404016 474896 534258 563939 606024 712344 1068516 1127878 1212048 1424688 1691817 2137032 2255756 3383634 4274064 4511512 5075451 6767268 9023024 10150902 13534536 20301804 27069072 40603608 81207216
- Sum of all divisors σ(n): 243347520
- Sum of proper divisors (its aliquot sum) s(n): 162140304
- 81207216 is an abundant number, because the sum of its proper divisors (162140304) is greater than itself. Its abundance is 80933088
Bases of 81207216
- Binary: 1001101011100011111101100002
- Hexadecimal: 0x4D71FB0
- Base-36: 1CCJW0
Squares and roots of 81207216
- 81207216 squared (812072162) is 6594611930470656
- 81207216 cubed (812072163) is 535530075473907543453696
-
The
square root of 81207216 is 9011.5046468389 -
The
cube root of 81207216 is 433.0435164019
Scales and comparisons
How big is 81207216?- 81,207,216 seconds is equal to 2 years, 30 weeks, 1 day, 21 hours, 33 minutes, 36 seconds.
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To count from 1 to 81,207,216 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 81207216 cubic inches would be around 36.1 feet tall.
Recreational maths with 81207216
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The information we have on file for 81207216 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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