81481

Names of 81481

• Cardinal: 81481 can be written as Eighty-one thousand, four hundred eighty-one.

Scientific notation

• Scientific notation: 8.1481 × 10⁴

Factors of 81481

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 4810

Divisors of 81481

• Number of divisors d(n): 4
• Complete list of divisors:
  1 17 4793 81481
• Sum of all divisors σ(n): 86292
• Sum of proper divisors (its aliquot sum) s(n): 4811
• 81481 is a deficient number, because the sum of its proper divisors (4811) is less than itself. Its deficiency is 76670

Bases of 81481

• Binary: 10011111001001001₂
• Hexadecimal: 0x13E49
• Base-36: 1QVD

Squares and roots of 81481

• 81481 squared (81481²) is 6639153361
• 81481 cubed (81481³) is 540964855007641
• The square root of 81481 is 285.4487694841
• The cube root of 81481 is 43.3529628359

Scales and comparisons

• 81,481 seconds is equal to 22 hours, 38 minutes, 1 second.
• To count from 1 to 81,481 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 81481 cubic inches would be around 3.6 feet tall.

Recreational maths with 81481

• 81481 backwards is 18418
• The number of decimal digits it has is: 5
• The sum of 81481's digits is 22
• More coming soon!