21231210

Names of 21231210

• Cardinal: 21231210 can be written as Twenty-one million, two hundred thirty-one thousand, two hundred ten.

Scientific notation

• Scientific notation: 2.123121 × 10⁷

Factors of 21231210

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 142

Divisors of 21231210

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 5 6 7 10 11 13 14 15 21 22 26 30 33 35 39 42 49 55 65 66 70 77 78 91 98 101 105 110 130 143 147 154 165 182 195 202 210 231 245 273 286 294 303 330 385 390 429 455 462 490 505 539 546 606 637 707 715 735 770 858 910 1001 1010 1078 1111 1155 1274 1313 1365 1414 1430 1470 1515 1617 1911 2002 2121 2145 2222 2310 2626 2695 2730 3003 3030 3185 3234 3333 3535 3822 3939 4242 4290 4949 5005 5390 5555 6006 6370 6565 6666 7007 7070 7777 7878 8085 9191 9555 9898 10010 10605 11110 13130 14014 14443 14847 15015 15554 16170 16665 18382 19110 19695 21021 21210 23331 24745 27573 28886 29694 30030 33330 35035 38885 39390 42042 43329 45955 46662 49490 54439 55146 64337 70070 72215 74235 77770 86658 91910 101101 105105 108878 116655 128674 137865 144430 148470 163317 193011 202202 210210 216645 233310 272195 275730 303303 321685 326634 386022 433290 505505 544390 606606 643370 707707 816585 965055 1011010 1415414 1516515 1633170 1930110 2123121 3033030 3538535 4246242 7077070 10615605 21231210
• Sum of all divisors σ(n): 70326144
• Sum of proper divisors (its aliquot sum) s(n): 49094934
• 21231210 is an abundant number, because the sum of its proper divisors (49094934) is greater than itself. Its abundance is 27863724

Bases of 21231210

• Binary: 1010000111111011001101010₂
• Hexadecimal: 0x143F66A
• Base-36: CN23U

Squares and roots of 21231210

• 21231210 squared (21231210²) is 450764278064100
• 21231210 cubed (21231210³) is 9570271048077300561000
• The square root of 21231210 is 4607.7337162647
• The cube root of 21231210 is 276.9012494073

Scales and comparisons

• 21,231,210 seconds is equal to 35 weeks, 17 hours, 33 minutes, 30 seconds.
• To count from 1 to 21,231,210 would take you about four 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 21231210 cubic inches would be around 23.1 feet tall.

Recreational maths with 21231210

• 21231210 backwards is 01213212
• The number of decimal digits it has is: 8
• The sum of 21231210's digits is 12
• More coming soon!