21157110

Names of 21157110

• Cardinal: 21157110 can be written as Twenty-one million, one hundred fifty-seven thousand, one hundred ten.

Scientific notation

• Scientific notation: 2.115711 × 10⁷

Factors of 21157110

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 130

Divisors of 21157110

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 5 6 9 10 13 15 18 26 30 39 45 65 78 90 107 117 130 169 195 214 234 321 338 390 507 535 585 642 845 963 1014 1070 1170 1391 1521 1605 1690 1926 2197 2535 2782 3042 3210 4173 4394 4815 5070 6591 6955 7605 8346 9630 10985 12519 13182 13910 15210 18083 19773 20865 21970 25038 32955 36166 39546 41730 54249 62595 65910 90415 98865 108498 125190 162747 180830 197730 235079 271245 325494 470158 542490 705237 813735 1175395 1410474 1627470 2115711 2350790 3526185 4231422 7052370 10578555 21157110
• Sum of all divisors σ(n): 60147360
• Sum of proper divisors (its aliquot sum) s(n): 38990250
• 21157110 is an abundant number, because the sum of its proper divisors (38990250) is greater than itself. Its abundance is 17833140

Bases of 21157110

• Binary: 1010000101101010011110110₂
• Hexadecimal: 0x142D4F6
• Base-36: CLGXI

Squares and roots of 21157110

• 21157110 squared (21157110²) is 447623303552100
• 21157110 cubed (21157110³) is 9470415471815170431000
• The square root of 21157110 is 4599.6858588387
• The cube root of 21157110 is 276.5787320741

Scales and comparisons

• 21,157,110 seconds is equal to 34 weeks, 6 days, 20 hours, 58 minutes, 30 seconds.
• To count from 1 to 21,157,110 would take you about three 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 21157110 cubic inches would be around 23 feet tall.

Recreational maths with 21157110

• 21157110 backwards is 01175112
• 21157110 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21157110's digits is 18
• More coming soon!