21971

21,971 is an odd composite number composed of two prime numbers multiplied together.

What does the number 21971 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 4 divisors.

21971 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of four divisors.

Prime factorization of 21971:

127 × 173

See below for interesting mathematical facts about the number 21971 from the Numbermatics database.


Names of 21971

  • Cardinal: 21971 can be written as Twenty-one thousand, nine hundred seventy-one.

Scientific notation

  • Scientific notation: 2.1971 × 104

Factors of 21971

  • Number of distinct prime factors ω(n): 2
  • Total number of prime factors Ω(n): 2
  • Sum of prime factors: 300

Divisors of 21971

  • Number of divisors d(n): 4
  • Complete list of divisors:
  • Sum of all divisors σ(n): 22272
  • Sum of proper divisors (its aliquot sum) s(n): 301
  • 21971 is a deficient number, because the sum of its proper divisors (301) is less than itself. Its deficiency is 21670

Bases of 21971

  • Binary: 1010101110100112
  • Hexadecimal: 0x55D3
  • Base-36: GYB

Squares and roots of 21971

  • 21971 squared (219712) is 482724841
  • 21971 cubed (219713) is 10605947481611
  • The square root of 21971 is 148.2261785245
  • The cube root of 21971 is 28.0080759017

Scales and comparisons

How big is 21971?
  • 21,971 seconds is equal to 6 hours, 6 minutes, 11 seconds.
  • To count from 1 to 21,971 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 21971 cubic inches would be around 2.3 feet tall.

Recreational maths with 21971

  • 21971 backwards is 17912
  • The number of decimal digits it has is: 5
  • The sum of 21971's digits is 20
  • More coming soon!

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"Number 21971 - Facts about the integer". Numbermatics.com. 2020. Web. 4 July 2020.

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Numbermatics. (2020). Number 21971 - Facts about the integer. Retrieved 4 July 2020, from https://numbermatics.com/n/21971/

Chicago style:
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The information we have on file for 21971 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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