81375

81,375 is an odd composite number composed of four prime numbers multiplied together.

What does the number 81375 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 32 divisors.

81375 is an odd composite number. It is composed of four distinct prime numbers multiplied together. It has a total of thirty-two divisors.

Prime factorization of 81375:

3 × 5³ × 7 × 31

(3 × 5 × 5 × 5 × 7 × 31)

See below for interesting mathematical facts about the number 81375 from the Numbermatics database.

Names of 81375

Cardinal: 81375 can be written as Eighty-one thousand, three hundred seventy-five.

Scientific notation

Scientific notation: 8.1375 × 10⁴

Factors of 81375

Number of distinct prime factors ω(n): 4
Total number of prime factors Ω(n): 6
Sum of prime factors: 46

Divisors of 81375

Number of divisors d(n): 32
Complete list of divisors:
1 3 5 7 15 21 25 31 35 75 93 105 125 155 175 217 375 465 525 651 775 875 1085 2325 2625 3255 3875 5425 11625 16275 27125 81375
Sum of all divisors σ(n): 159744
Sum of proper divisors (its aliquot sum) s(n): 78369
81375 is a deficient number, because the sum of its proper divisors (78369) is less than itself. Its deficiency is 3006

Bases of 81375

Binary: 10011110111011111₂
Hexadecimal: 0x13DDF
Base-36: 1QSF

Squares and roots of 81375

81375 squared (81375²) is 6621890625
81375 cubed (81375³) is 538856349609375
The square root of 81375 is 285.2630365121
The cube root of 81375 is 43.3341551455

Scales and comparisons

How big is 81375?

81,375 seconds is equal to 22 hours, 36 minutes, 15 seconds.
To count from 1 to 81,375 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 81375 cubic inches would be around 3.6 feet tall.

Recreational maths with 81375

81375 backwards is 57318
The number of decimal digits it has is: 5
The sum of 81375's digits is 24
More coming soon!

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The information we have on file for 81375 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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