81315

81,315 is an odd composite number composed of four prime numbers multiplied together.

What does the number 81315 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 24 divisors.

81315 is an odd composite number. It is composed of four distinct prime numbers multiplied together. It has a total of twenty-four divisors.

Prime factorization of 81315:

3² × 5 × 13 × 139

(3 × 3 × 5 × 13 × 139)

See below for interesting mathematical facts about the number 81315 from the Numbermatics database.

Names of 81315

Cardinal: 81315 can be written as Eighty-one thousand, three hundred fifteen.

Scientific notation

Scientific notation: 8.1315 × 10⁴

Factors of 81315

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 5
Sum of prime factors: 160

Divisors of 81315

Number of divisors d(n): 24
Complete list of divisors:
1 3 5 9 13 15 39 45 65 117 139 195 417 585 695 1251 1807 2085 5421 6255 9035 16263 27105 81315
Sum of all divisors σ(n): 152880
Sum of proper divisors (its aliquot sum) s(n): 71565
81315 is a deficient number, because the sum of its proper divisors (71565) is less than itself. Its deficiency is 9750

Bases of 81315

Binary: 10011110110100011₂
Hexadecimal: 0x13DA3
Base-36: 1QQR

Squares and roots of 81315

81315 squared (81315²) is 6612129225
81315 cubed (81315³) is 537665287930875
The square root of 81315 is 285.1578510229
The cube root of 81315 is 43.3235020431

Scales and comparisons

How big is 81315?

81,315 seconds is equal to 22 hours, 35 minutes, 15 seconds.
To count from 1 to 81,315 would take you about twenty-two hours.

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 81315 cubic inches would be around 3.6 feet tall.

Recreational maths with 81315

81315 backwards is 51318
The number of decimal digits it has is: 5
The sum of 81315's digits is 18
More coming soon!

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The information we have on file for 81315 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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