13218981

Names of 13218981

• Cardinal: 13218981 can be written as Thirteen million, two hundred eighteen thousand, nine hundred eighty-one.

Scientific notation

• Scientific notation: 1.3218981 × 10⁷

Factors of 13218981

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 43731

Divisors of 13218981

• Number of divisors d(n): 8
• Complete list of divisors:
  1 3 101 303 43627 130881 4406327 13218981
• Sum of all divisors σ(n): 17800224
• Sum of proper divisors (its aliquot sum) s(n): 4581243
• 13218981 is a deficient number, because the sum of its proper divisors (4581243) is less than itself. Its deficiency is 8637738

Bases of 13218981

• Binary: 110010011011010010100101₂
• Hexadecimal: 0xC9B4A5
• Base-36: 7VBTX

Squares and roots of 13218981

• 13218981 squared (13218981²) is 174741458678361
• 13218981 cubed (13218981³) is 2309904022181539170141
• The square root of 13218981 is 3635.7916606979
• The cube root of 13218981 is 236.4463746161

Scales and comparisons

• 13,218,981 seconds is equal to 21 weeks, 5 days, 23 hours, 56 minutes, 21 seconds.
• To count from 1 to 13,218,981 would take you about thirty-two weeks!

  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 13218981 cubic inches would be around 19.7 feet tall.

Recreational maths with 13218981

• 13218981 backwards is 18981231
• The number of decimal digits it has is: 8
• The sum of 13218981's digits is 33
• More coming soon!