21351

21,351 is an odd composite number composed of three prime numbers multiplied together.

What does the number 21351 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 8 divisors.

21351 is an odd composite number. It is composed of three distinct prime numbers multiplied together. It has a total of eight divisors.

Prime factorization of 21351:

3 × 11 × 647

See below for interesting mathematical facts about the number 21351 from the Numbermatics database.


Names of 21351

  • Cardinal: 21351 can be written as Twenty-one thousand, three hundred fifty-one.

Scientific notation

  • Scientific notation: 2.1351 × 104

Factors of 21351

  • Number of distinct prime factors ω(n): 3
  • Total number of prime factors Ω(n): 3
  • Sum of prime factors: 661

Divisors of 21351

  • Number of divisors d(n): 8
  • Complete list of divisors:
  • Sum of all divisors σ(n): 31104
  • Sum of proper divisors (its aliquot sum) s(n): 9753
  • 21351 is a deficient number, because the sum of its proper divisors (9753) is less than itself. Its deficiency is 11598

Bases of 21351

  • Binary: 1010011011001112
  • Hexadecimal: 0x5367
  • Base-36: GH3

Squares and roots of 21351

  • 21351 squared (213512) is 455865201
  • 21351 cubed (213513) is 9733177906551
  • The square root of 21351 is 146.1198138515
  • The cube root of 21351 is 27.7421047257

Scales and comparisons

How big is 21351?
  • 21,351 seconds is equal to 5 hours, 55 minutes, 51 seconds.
  • To count from 1 to 21,351 would take you about five 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 21351 cubic inches would be around 2.3 feet tall.

Recreational maths with 21351

  • 21351 backwards is 15312
  • The number of decimal digits it has is: 5
  • The sum of 21351's digits is 12
  • More coming soon!

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"Number 21351 - Facts about the integer". Numbermatics.com. 2024. Web. 28 March 2024.

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Numbermatics. (2024). Number 21351 - Facts about the integer. Retrieved 28 March 2024, from https://numbermatics.com/n/21351/

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The information we have on file for 21351 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!

Keywords: Divisors of 21351, math, Factors of 21351, curriculum, school, college, exams, university, Prime factorization of 21351, STEM, science, technology, engineering, physics, economics, calculator, twenty-one thousand, three hundred fifty-one.

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