31873986721

Names of 31873986721

• Cardinal: 31873986721 can be written as Thirty-one billion, eight hundred seventy-three million, nine hundred eighty-six thousand, seven hundred twenty-one.

Scientific notation

• Scientific notation: 3.1873986721 × 10¹⁰

Factors of 31873986721

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 478222

Divisors of 31873986721

• Number of divisors d(n): 4
• Complete list of divisors:
  1 80051 398171 31873986721
• Sum of all divisors σ(n): 31874464944
• Sum of proper divisors (its aliquot sum) s(n): 478223
• 31873986721 is a deficient number, because the sum of its proper divisors (478223) is less than itself. Its deficiency is 31873508498

Bases of 31873986721

• Binary: 11101101011110101100111000010100001₂
• Hexadecimal: 0x76BD670A1
• Base-36: EN4Y5K1

Squares and roots of 31873986721

• 31873986721 squared (31873986721²) is 1015951029490484331841
• 31873986721 cubed (31873986721³) is 32382409623165976988958591483361
• The square root of 31873986721 is 178532.8729422119
• The cube root of 31873986721 is 3170.6292547827

Scales and comparisons

• 31,873,986,721 seconds is equal to 1,013 years, 25 weeks, 4 days, 21 hours, 12 minutes, 1 second.
• To count from 1 to 31,873,986,721 would take you about two thousand and twenty-six 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 31873986721 cubic inches would be around 264.2 feet tall.

Recreational maths with 31873986721

• 31873986721 backwards is 12768937813
• The number of decimal digits it has is: 11
• The sum of 31873986721's digits is 55
• More coming soon!