81321

Names of 81321

• Cardinal: 81321 can be written as Eighty-one thousand, three hundred twenty-one.

Scientific notation

• Scientific notation: 8.1321 × 10⁴

Factors of 81321

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 27110

Divisors of 81321

• Number of divisors d(n): 4
• Complete list of divisors:
  1 3 27107 81321
• Sum of all divisors σ(n): 108432
• Sum of proper divisors (its aliquot sum) s(n): 27111
• 81321 is a deficient number, because the sum of its proper divisors (27111) is less than itself. Its deficiency is 54210

Bases of 81321

• Binary: 10011110110101001₂
• Hexadecimal: 0x13DA9
• Base-36: 1QQX

Squares and roots of 81321

• 81321 squared (81321²) is 6613105041
• 81321 cubed (81321³) is 537784315039161
• The square root of 81321 is 285.1683713177
• The cube root of 81321 is 43.3245675891

Scales and comparisons

• 81,321 seconds is equal to 22 hours, 35 minutes, 21 seconds.
• To count from 1 to 81,321 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 81321 cubic inches would be around 3.6 feet tall.

Recreational maths with 81321

• 81321 backwards is 12318
• The number of decimal digits it has is: 5
• The sum of 81321's digits is 15
• More coming soon!