321 is an odd composite number composed of two prime numbers multiplied together.

What does the number 321 look like?

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

321 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 321:

3 × 107

See below for interesting mathematical facts about the number 321 from the Numbermatics database.

Names of 321

  • Cardinal: 321 can be written as Three hundred twenty-one.

Scientific notation

  • Scientific notation: 3.21 × 102

Factors of 321

  • Number of distinct prime factors ω(n): 2
  • Total number of prime factors Ω(n): 2
  • Sum of prime factors: 110

Divisors of 321

  • Number of divisors d(n): 4
  • Complete list of divisors:
  • Sum of all divisors σ(n): 432
  • Sum of proper divisors (its aliquot sum) s(n): 111
  • 321 is a deficient number, because the sum of its proper divisors (111) is less than itself. Its deficiency is 210

Bases of 321

  • Binary: 1010000012
  • Hexadecimal: 0x141
  • Base-36: 8X

Squares and roots of 321

  • 321 squared (3212) is 103041
  • 321 cubed (3213) is 33076161
  • The square root of 321 is 17.9164728671
  • The cube root of 321 is 6.8470212775

Scales and comparisons

How big is 321?
  • 321 seconds is equal to 5 minutes, 21 seconds.
  • To count from 1 to 321 would take you about two minutes.

    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 321 cubic inches would be around 0.6 feet tall.

Recreational maths with 321

  • 321 backwards is 123
  • The number of decimal digits it has is: 3
  • The sum of 321's digits is 6
  • More coming soon!

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"Number 321 - Facts about the integer". Numbermatics.com. 2023. Web. 6 June 2023.

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Numbermatics. (2023). Number 321 - Facts about the integer. Retrieved 6 June 2023, from https://numbermatics.com/n/321/

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The information we have on file for 321 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 321, math, Factors of 321, curriculum, school, college, exams, university, Prime factorization of 321, STEM, science, technology, engineering, physics, economics, calculator, three hundred twenty-one.

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