31995947921

Names of 31995947921

• Cardinal: 31995947921 can be written as Thirty-one billion, nine hundred ninety-five million, nine hundred forty-seven thousand, nine hundred twenty-one.

Scientific notation

• Scientific notation: 3.1995947921 × 10¹⁰

Factors of 31995947921

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 2277

Divisors of 31995947921

• Number of divisors d(n): 64
• Complete list of divisors:
  1 7 19 29 49 79 133 203 343 551 553 931 1421 1501 2143 2291 3857 3871 6517 9947 10507 15001 16037 26999 27097 40717 43529 62147 73549 105007 112259 169297 188993 285019 304703 435029 514843 735049 785813 1180793 1185079 1995133 2132921 3045203 3216643 4909613 8265551 8295553 13965931 14930447 21316421 22516501 34367291 57858857 58068871 93282647 157615507 240571037 405011999 652978529 1103308549 1683997259 4570849703 31995947921
• Sum of all divisors σ(n): 41164800000
• Sum of proper divisors (its aliquot sum) s(n): 9168852079
• 31995947921 is a deficient number, because the sum of its proper divisors (9168852079) is less than itself. Its deficiency is 22827095842

Bases of 31995947921

• Binary: 11101110011000110110110101110010001₂
• Hexadecimal: 0x7731B6B91
• Base-36: EP5K7F5

Squares and roots of 31995947921

• 31995947921 squared (31995947921²) is 1023740683363344222241
• 31995947921 cubed (31995947921³) is 32755553589502512855219285910961
• The square root of 31995947921 is 178874.1119363001
• The cube root of 31995947921 is 3174.6680925617

Scales and comparisons

• 31,995,947,921 seconds is equal to 1,017 years, 19 weeks, 2 days, 11 hours, 18 minutes, 41 seconds.
• To count from 1 to 31,995,947,921 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 31995947921 cubic inches would be around 264.6 feet tall.

Recreational maths with 31995947921

• 31995947921 backwards is 12974959913
• The number of decimal digits it has is: 11
• The sum of 31995947921's digits is 59
• More coming soon!