31987977021

Names of 31987977021

• Cardinal: 31987977021 can be written as Thirty-one billion, nine hundred eighty-seven million, nine hundred seventy-seven thousand and twenty-one.

Scientific notation

• Scientific notation: 3.1987977021 × 10¹⁰

Factors of 31987977021

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 3860

Divisors of 31987977021

• Number of divisors d(n): 96
• Complete list of divisors:
  1 3 7 9 11 13 21 33 39 63 77 91 99 117 143 231 273 429 693 819 1001 1287 1583 2243 3003 4749 6729 9009 11081 14247 15701 17413 20187 20579 24673 29159 33243 47103 52239 61737 74019 87477 99729 121891 141309 144053 156717 172711 185211 204113 222057 226369 262431 320749 365673 432159 518133 612339 679107 962247 1097019 1296477 1554399 1584583 1837017 2037321 2245243 2886741 3550669 4753749 6735729 10652007 14261247 20207187 24854683 31956021 39057359 46158697 74564049 117172077 138476091 223692147 273401513 323110879 351516231 415428273 507745667 820204539 969332637 1523237001 2460613617 2907997911 3554219669 4569711003 10662659007 31987977021
• Sum of all divisors σ(n): 62104154112
• Sum of proper divisors (its aliquot sum) s(n): 30116177091
• 31987977021 is a deficient number, because the sum of its proper divisors (30116177091) is less than itself. Its deficiency is 1871799930

Bases of 31987977021

• Binary: 11101110010101000011100101100111101₂
• Hexadecimal: 0x772A1CB3D
• Base-36: EP0TD19

Squares and roots of 31987977021

• 31987977021 squared (31987977021²) is 1023230673896024034441
• 31987977021 cubed (31987977021³) is 32731079283768361356962420580261
• The square root of 31987977021 is 178851.8297949449
• The cube root of 31987977021 is 3174.4044439313

Scales and comparisons

• 31,987,977,021 seconds is equal to 1,017 years, 6 weeks, 1 day, 5 hours, 10 minutes, 21 seconds.
• To count from 1 to 31,987,977,021 would take you about two thousand and thirty-four 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 31987977021 cubic inches would be around 264.5 feet tall.

Recreational maths with 31987977021

• 31987977021 backwards is 12077978913
• The number of decimal digits it has is: 11
• The sum of 31987977021's digits is 54
• More coming soon!