21975

21,975 is an odd composite number composed of three prime numbers multiplied together.

What does the number 21975 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 12 divisors.

21975 is an odd composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twelve divisors.

Prime factorization of 21975:

3 × 52 × 293

(3 × 5 × 5 × 293)

See below for interesting mathematical facts about the number 21975 from the Numbermatics database.


Names of 21975

  • Cardinal: 21975 can be written as Twenty-one thousand, nine hundred seventy-five.

Scientific notation

  • Scientific notation: 2.1975 × 104

Factors of 21975

  • Number of distinct prime factors ω(n): 3
  • Total number of prime factors Ω(n): 4
  • Sum of prime factors: 301

Divisors of 21975

  • Number of divisors d(n): 12
  • Complete list of divisors:
  • Sum of all divisors σ(n): 36456
  • Sum of proper divisors (its aliquot sum) s(n): 14481
  • 21975 is a deficient number, because the sum of its proper divisors (14481) is less than itself. Its deficiency is 7494

Bases of 21975

  • Binary: 1010101110101112
  • Hexadecimal: 0x55D7
  • Base-36: GYF

Squares and roots of 21975

  • 21975 squared (219752) is 482900625
  • 21975 cubed (219753) is 10611741234375
  • The square root of 21975 is 148.2396708039
  • The cube root of 21975 is 28.0097754983

Scales and comparisons

How big is 21975?
  • 21,975 seconds is equal to 6 hours, 6 minutes, 15 seconds.
  • To count from 1 to 21,975 would take you about six 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 21975 cubic inches would be around 2.3 feet tall.

Recreational maths with 21975

  • 21975 backwards is 57912
  • The number of decimal digits it has is: 5
  • The sum of 21975's digits is 24
  • More coming soon!

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"Number 21975 - Facts about the integer". Numbermatics.com. 2021. Web. 31 July 2021.

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Numbermatics. (2021). Number 21975 - Facts about the integer. Retrieved 31 July 2021, from https://numbermatics.com/n/21975/

Chicago style:
Numbermatics. 2021. "Number 21975 - Facts about the integer". https://numbermatics.com/n/21975/

The information we have on file for 21975 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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