21901

21,901 is an odd composite number composed of two prime numbers multiplied together.

What does the number 21901 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 6 divisors.

21901 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of six divisors.

Prime factorization of 21901:

112 × 181

(11 × 11 × 181)

See below for interesting mathematical facts about the number 21901 from the Numbermatics database.


Names of 21901

  • Cardinal: 21901 can be written as Twenty-one thousand, nine hundred one.

Scientific notation

  • Scientific notation: 2.1901 × 104

Factors of 21901

  • Number of distinct prime factors ω(n): 2
  • Total number of prime factors Ω(n): 3
  • Sum of prime factors: 192

Divisors of 21901

  • Number of divisors d(n): 6
  • Complete list of divisors:
  • Sum of all divisors σ(n): 24206
  • Sum of proper divisors (its aliquot sum) s(n): 2305
  • 21901 is a deficient number, because the sum of its proper divisors (2305) is less than itself. Its deficiency is 19596

Bases of 21901

  • Binary: 1010101100011012
  • Hexadecimal: 0x558D
  • Base-36: GWD

Squares and roots of 21901

  • 21901 squared (219012) is 479653801
  • 21901 cubed (219013) is 10504897895701
  • The square root of 21901 is 147.9898645179
  • The cube root of 21901 is 27.9782995127

Scales and comparisons

How big is 21901?
  • 21,901 seconds is equal to 6 hours, 5 minutes, 1 second.
  • To count from 1 to 21,901 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 21901 cubic inches would be around 2.3 feet tall.

Recreational maths with 21901

  • 21901 backwards is 10912
  • The number of decimal digits it has is: 5
  • The sum of 21901's digits is 13
  • More coming soon!

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"Number 21901 - Facts about the integer". Numbermatics.com. 2024. Web. 28 March 2024.

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Numbermatics. (2024). Number 21901 - Facts about the integer. Retrieved 28 March 2024, from https://numbermatics.com/n/21901/

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Numbermatics. 2024. "Number 21901 - Facts about the integer". https://numbermatics.com/n/21901/

The information we have on file for 21901 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 21901, math, Factors of 21901, curriculum, school, college, exams, university, Prime factorization of 21901, STEM, science, technology, engineering, physics, economics, calculator, twenty-one thousand, nine hundred one.

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