81243442
81,243,442 is an even composite number composed of six prime numbers multiplied together.
81243442 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of sixty-four divisors.
Prime factorization of 81243442:
2 × 7 × 17 × 29 × 79 × 149
See below for interesting mathematical facts about the number 81243442 from the Numbermatics database.
Names of 81243442
- Cardinal: 81243442 can be written as Eighty-one million, two hundred forty-three thousand, four hundred forty-two.
Scientific notation
- Scientific notation: 8.1243442 × 107
Factors of 81243442
Divisors of 81243442
- Number of divisors d(n): 64
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Complete list of divisors:
1 2 7 14 17 29 34 58 79 119 149 158 203 238 298 406 493 553 986 1043 1106 1343 2086 2291 2533 2686 3451 4321 4582 5066 6902 8642 9401 11771 16037 17731 18802 23542 30247 32074 35462 38947 60494 73457 77894 82397 146914 164794 200107 272629 341359 400214 514199 545258 682718 1028398 1400749 2389513 2801498 4779026 5803103 11606206 40621721 81243442
- Sum of all divisors σ(n): 155520000
- Sum of proper divisors (its aliquot sum) s(n): 74276558
- 81243442 is a deficient number, because the sum of its proper divisors (74276558) is less than itself. Its deficiency is 6966884
Bases of 81243442
- Binary: 1001101011110101101001100102
- Hexadecimal: 0x4D7AD32
- Base-36: 1CDBUA
Squares and roots of 81243442
- 81243442 squared (812434422) is 6600496868007364
- 81243442 cubed (812434423) is 536247084467137932706888
-
The
square root of 81243442 is 9013.5144089307 -
The
cube root of 81243442 is 433.1078994419
Scales and comparisons
How big is 81243442?- 81,243,442 seconds is equal to 2 years, 30 weeks, 2 days, 7 hours, 37 minutes, 22 seconds.
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To count from 1 to 81,243,442 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 81243442 cubic inches would be around 36.1 feet tall.
Recreational maths with 81243442
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The information we have on file for 81243442 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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