81331

Names of 81331

• Cardinal: 81331 can be written as Eighty-one thousand, three hundred thirty-one.

Scientific notation

• Scientific notation: 8.1331 × 10⁴

Factors of 81331

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 81331

Divisors of 81331

• Number of divisors d(n): 2
• Complete list of divisors:
  1 81331
• Sum of all divisors σ(n): 81332
• Sum of proper divisors (its aliquot sum) s(n): 1
• 81331 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 81330

Bases of 81331

• Binary: 10011110110110011₂
• Hexadecimal: 0x13DB3
• Base-36: 1QR7

Squares and roots of 81331

• 81331 squared (81331²) is 6614731561
• 81331 cubed (81331³) is 537982732587691
• The square root of 81331 is 285.1859042799
• The cube root of 81331 is 43.3263433827

Scales and comparisons

• 81,331 seconds is equal to 22 hours, 35 minutes, 31 seconds.
• To count from 1 to 81,331 would take you about twenty-two hours.

  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 81331 cubic inches would be around 3.6 feet tall.

Recreational maths with 81331

• 81331 backwards is 13318
• The number of decimal digits it has is: 5
• The sum of 81331's digits is 16
• More coming soon!