165

165 is an odd composite number composed of three prime numbers multiplied together.

What does the number 165 look like?

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

165 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 165:

3 × 5 × 11

See below for interesting mathematical facts about the number 165 from the Numbermatics database.

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Names Factors Divisors Scales Roots Fun

Names of 165

  • Cardinal: 165 can be written as One hundred sixty-five.

Scientific notation

  • Scientific notation: 1.65 × 102

Factors of 165

  • Number of distinct prime factors ω(n): 3
  • Total number of prime factors Ω(n): 3
  • Sum of prime factors: 19

Divisors of 165

  • Number of divisors d(n): 8
  • Complete list of divisors:
  • Sum of all divisors σ(n): 288
  • Sum of proper divisors (its aliquot sum) s(n): 123
  • 165 is a deficient number, because the sum of its proper divisors (123) is less than itself. Its deficiency is 42

Bases of 165

  • Binary: 101001012
  • Hexadecimal: 0xA5
  • Base-36: 4L

Squares and roots of 165

  • 165 squared (1652) is 27225
  • 165 cubed (1653) is 4492125
  • The square root of 165 is 12.8452325787
  • The cube root of 165 is 5.4848065525

Scales and comparisons

How big is 165?
  • 165 seconds is equal to 2 minutes, 45 seconds.
  • To count from 1 to 165 would take you about twenty-two seconds.

    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 165 cubic inches would be around 0.5 feet tall.

Recreational maths with 165

  • 165 backwards is 561
  • The number of decimal digits it has is: 3
  • The sum of 165's digits is 12
  • More coming soon!

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The information we have on file for 165 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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