7221

7,221 is an odd composite number composed of three prime numbers multiplied together.

What does the number 7221 look like?

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

7221 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 7221:

3 × 29 × 83

See below for interesting mathematical facts about the number 7221 from the Numbermatics database.


Names of 7221

  • Cardinal: 7221 can be written as Seven thousand, two hundred twenty-one.

Scientific notation

  • Scientific notation: 7.221 × 103

Factors of 7221

  • Number of distinct prime factors ω(n): 3
  • Total number of prime factors Ω(n): 3
  • Sum of prime factors: 115

Divisors of 7221

  • Number of divisors d(n): 8
  • Complete list of divisors:
  • Sum of all divisors σ(n): 10080
  • Sum of proper divisors (its aliquot sum) s(n): 2859
  • 7221 is a deficient number, because the sum of its proper divisors (2859) is less than itself. Its deficiency is 4362

Bases of 7221

  • Binary: 11100001101012
  • Hexadecimal: 0x1C35
  • Base-36: 5KL

Squares and roots of 7221

  • 7221 squared (72212) is 52142841
  • 7221 cubed (72213) is 376523454861
  • The square root of 7221 is 84.9764673307
  • The cube root of 7221 is 19.3285428745

Scales and comparisons

How big is 7221?
  • 7,221 seconds is equal to 2 hours, 21 seconds.
  • To count from 1 to 7,221 would take you about two 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 7221 cubic inches would be around 1.6 feet tall.

Recreational maths with 7221

  • 7221 backwards is 1227
  • The number of decimal digits it has is: 4
  • The sum of 7221's digits is 12
  • More coming soon!

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The information we have on file for 7221 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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