21383131

Names of 21383131

• Cardinal: 21383131 can be written as Twenty-one million, three hundred eighty-three thousand, one hundred thirty-one.

Scientific notation

• Scientific notation: 2.1383131 × 10⁷

Factors of 21383131

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 277721

Divisors of 21383131

• Number of divisors d(n): 8
• Complete list of divisors:
  1 7 11 77 277703 1943921 3054733 21383131
• Sum of all divisors σ(n): 26659584
• Sum of proper divisors (its aliquot sum) s(n): 5276453
• 21383131 is a deficient number, because the sum of its proper divisors (5276453) is less than itself. Its deficiency is 16106678

Bases of 21383131

• Binary: 1010001100100011111011011₂
• Hexadecimal: 0x14647DB
• Base-36: CQBBV

Squares and roots of 21383131

• 21383131 squared (21383131²) is 457238291363161
• 21383131 cubed (21383131³) is 9777186282434640237091
• The square root of 21383131 is 4624.1897668671
• The cube root of 21383131 is 277.5601406323

Scales and comparisons

• 21,383,131 seconds is equal to 35 weeks, 2 days, 11 hours, 45 minutes, 31 seconds.
• To count from 1 to 21,383,131 would take you about five 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 21383131 cubic inches would be around 23.1 feet tall.

Recreational maths with 21383131

• 21383131 backwards is 13138312
• The number of decimal digits it has is: 8
• The sum of 21383131's digits is 22
• More coming soon!