1,555 is an odd composite number composed of two prime numbers multiplied together.

What does the number 1555 look like?

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

1555 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 1555:

5 × 311

See below for interesting mathematical facts about the number 1555 from the Numbermatics database.

Names of 1555

  • Cardinal: 1555 can be written as One thousand, five hundred fifty-five.

Scientific notation

  • Scientific notation: 1.555 × 103

Factors of 1555

  • Number of distinct prime factors ω(n): 2
  • Total number of prime factors Ω(n): 2
  • Sum of prime factors: 316

Divisors of 1555

  • Number of divisors d(n): 4
  • Complete list of divisors:
  • Sum of all divisors σ(n): 1872
  • Sum of proper divisors (its aliquot sum) s(n): 317
  • 1555 is a deficient number, because the sum of its proper divisors (317) is less than itself. Its deficiency is 1238

Bases of 1555

  • Binary: 110000100112
  • Hexadecimal: 0x613
  • Base-36: 177

Squares and roots of 1555

  • 1555 squared (15552) is 2418025
  • 1555 cubed (15553) is 3760028875
  • The square root of 1555 is 39.4334883063
  • The cube root of 1555 is 11.5853759431

Scales and comparisons

How big is 1555?
  • 1,555 seconds is equal to 25 minutes, 55 seconds.
  • To count from 1 to 1,555 would take you about twenty-five 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 1555 cubic inches would be around 1 feet tall.

Recreational maths with 1555

  • 1555 backwards is 5551
  • The number of decimal digits it has is: 4
  • The sum of 1555's digits is 16
  • More coming soon!

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The information we have on file for 1555 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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