91221

Names of 91221

• Cardinal: 91221 can be written as Ninety-one thousand, two hundred twenty-one.

Scientific notation

• Scientific notation: 9.1221 × 10⁴

Factors of 91221

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 2355

Divisors of 91221

• Number of divisors d(n): 8
• Complete list of divisors:
  1 3 13 39 2339 7017 30407 91221
• Sum of all divisors σ(n): 131040
• Sum of proper divisors (its aliquot sum) s(n): 39819
• 91221 is a deficient number, because the sum of its proper divisors (39819) is less than itself. Its deficiency is 51402

Bases of 91221

• Binary: 10110010001010101₂
• Hexadecimal: 0x16455
• Base-36: 1YDX

Squares and roots of 91221

• 91221 squared (91221²) is 8321270841
• 91221 cubed (91221³) is 759074647386861
• The square root of 91221 is 302.0281443841
• The cube root of 91221 is 45.0157969231

Scales and comparisons

• 91,221 seconds is equal to 1 day, 1 hour, 20 minutes, 21 seconds.
• To count from 1 to 91,221 would take you about twenty minutes.

  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 91221 cubic inches would be around 3.8 feet tall.

Recreational maths with 91221

• 91221 backwards is 12219
• The number of decimal digits it has is: 5
• The sum of 91221's digits is 15
• More coming soon!