21131572

Names of 21131572

• Cardinal: 21131572 can be written as Twenty-one million, one hundred thirty-one thousand, five hundred seventy-two.

Scientific notation

• Scientific notation: 2.1131572 × 10⁷

Factors of 21131572

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 219

Divisors of 21131572

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 4 7 11 14 19 22 23 28 38 44 46 76 77 92 133 154 157 161 209 253 266 308 314 322 418 437 506 532 628 644 836 874 1012 1099 1463 1727 1748 1771 2198 2926 2983 3059 3454 3542 3611 4396 4807 5852 5966 6118 6908 7084 7222 9614 11932 12089 12236 14444 19228 20881 24178 25277 32813 33649 39721 41762 48356 50554 65626 67298 68609 79442 83524 101108 131252 134596 137218 158884 229691 274436 278047 459382 480263 556094 754699 918764 960526 1112188 1509398 1921052 3018796 5282893 10565786 21131572
• Sum of all divisors σ(n): 50964480
• Sum of proper divisors (its aliquot sum) s(n): 29832908
• 21131572 is an abundant number, because the sum of its proper divisors (29832908) is greater than itself. Its abundance is 8701336

Bases of 21131572

• Binary: 1010000100111000100110100₂
• Hexadecimal: 0x1427134
• Base-36: CKX84

Squares and roots of 21131572

• 21131572 squared (21131572²) is 446543335191184
• 21131572 cubed (21131572³) is 9436162638712638461248
• The square root of 21131572 is 4596.9089614653
• The cube root of 21131572 is 276.4674044637

Scales and comparisons

• 21,131,572 seconds is equal to 34 weeks, 6 days, 13 hours, 52 minutes, 52 seconds.
• To count from 1 to 21,131,572 would take you about two days!

  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 21131572 cubic inches would be around 23 feet tall.

Recreational maths with 21131572

• 21131572 backwards is 27513112
• 21131572 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21131572's digits is 22
• More coming soon!