31145817821

Names of 31145817821

• Cardinal: 31145817821 can be written as Thirty-one billion, one hundred forty-five million, eight hundred seventeen thousand, eight hundred twenty-one.

Scientific notation

• Scientific notation: 3.1145817821 × 10¹⁰

Factors of 31145817821

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 147610722

Divisors of 31145817821

• Number of divisors d(n): 4
• Complete list of divisors:
  1 211 147610511 31145817821
• Sum of all divisors σ(n): 31293428544
• Sum of proper divisors (its aliquot sum) s(n): 147610723
• 31145817821 is a deficient number, because the sum of its proper divisors (147610723) is less than itself. Its deficiency is 30998207098

Bases of 31145817821

• Binary: 11101000000011011110111011011011101₂
• Hexadecimal: 0x7406F76DD
• Base-36: EB3EYU5

Squares and roots of 31145817821

• 31145817821 squared (31145817821²) is 970061967738921188041
• 31145817821 cubed (31145817821³) is 30213373322277218613801869878661
• The square root of 31145817821 is 176481.7775890755
• The cube root of 31145817821 is 3146.2984258373

Scales and comparisons

• 31,145,817,821 seconds is equal to 990 years, 17 weeks, 5 days, 3 minutes, 41 seconds.
• To count from 1 to 31,145,817,821 would take you about one thousand, nine hundred eighty 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 31145817821 cubic inches would be around 262.2 feet tall.

Recreational maths with 31145817821

• 31145817821 backwards is 12871854113
• The number of decimal digits it has is: 11
• The sum of 31145817821's digits is 41
• More coming soon!