31813406721

Names of 31813406721

• Cardinal: 31813406721 can be written as Thirty-one billion, eight hundred thirteen million, four hundred six thousand, seven hundred twenty-one.

Scientific notation

• Scientific notation: 3.1813406721 × 10¹⁰

Factors of 31813406721

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 1249

Divisors of 31813406721

• Number of divisors d(n): 64
• Complete list of divisors:
  1 3 9 27 53 71 159 213 477 521 601 639 1431 1563 1803 1917 3763 4689 5409 11289 14067 16227 27613 31853 33867 36991 42671 82839 95559 101601 110973 128013 248517 286677 313121 332919 384039 745551 860031 939363 998757 1152117 1960523 2261563 2818089 5881569 6784689 8454267 16595413 17644707 20354067 22231591 49786239 52934121 61062201 66694773 149358717 200084319 448076151 600252957 1178274323 3534822969 10604468907 31813406721
• Sum of all divisors σ(n): 48871226880
• Sum of proper divisors (its aliquot sum) s(n): 17057820159
• 31813406721 is a deficient number, because the sum of its proper divisors (17057820159) is less than itself. Its deficiency is 14755586562

Bases of 31813406721

• Binary: 11101101000001110100001000000000001₂
• Hexadecimal: 0x7683A1001
• Base-36: EM4VPQ9

Squares and roots of 31813406721

• 31813406721 squared (31813406721²) is 1012092847195767971841
• 31813406721 cubed (31813406721³) is 32198121387253870798123008143361
• The square root of 31813406721 is 178363.1316191773
• The cube root of 31813406721 is 3168.6192715509

Scales and comparisons

• 31,813,406,721 seconds is equal to 1,011 years, 29 weeks, 3 days, 17 hours, 25 minutes, 21 seconds.
• To count from 1 to 31,813,406,721 would take you about two thousand and twenty-three years!

  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 31813406721 cubic inches would be around 264.1 feet tall.

Recreational maths with 31813406721

• 31813406721 backwards is 12760431813
• The number of decimal digits it has is: 11
• The sum of 31813406721's digits is 36
• More coming soon!