221991770

Names of 221991770

• Cardinal: 221991770 can be written as Two hundred twenty-one million, nine hundred ninety-one thousand, seven hundred seventy.

Scientific notation

• Scientific notation: 2.2199177 × 10⁸

Factors of 221991770

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 436

Divisors of 221991770

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 5 7 10 11 13 14 22 26 35 55 65 67 70 77 91 110 130 134 143 154 182 286 331 335 385 455 469 662 670 715 737 770 871 910 938 1001 1430 1474 1655 1742 2002 2317 2345 3310 3641 3685 4303 4355 4634 4690 5005 5159 6097 7282 7370 8606 8710 9581 10010 10318 11585 12194 18205 19162 21515 22177 23170 25487 25795 30121 30485 36410 43030 44354 47333 47905 50974 51590 60242 60970 67067 94666 95810 110885 127435 134134 150605 155239 221770 236665 243947 254870 288301 301210 310478 331331 335335 473330 487894 576602 662662 670670 776195 1219735 1441505 1552390 1656655 1707629 2018107 2439470 2883010 3171311 3313310 3415258 4036214 6342622 8538145 10090535 15856555 17076290 20181070 22199177 31713110 44398354 110995885 221991770
• Sum of all divisors σ(n): 546158592
• Sum of proper divisors (its aliquot sum) s(n): 324166822
• 221991770 is an abundant number, because the sum of its proper divisors (324166822) is greater than itself. Its abundance is 102175052

Bases of 221991770

• Binary: 1101001110110101001101011010₂
• Hexadecimal: 0xD3B535A
• Base-36: 3O61Y2

Squares and roots of 221991770

• 221991770 squared (221991770²) is 49280345947732900
• 221991770 cubed (221991770³) is 10939831223149553958233000
• The square root of 221991770 is 14899.3882424749
• The cube root of 221991770 is 605.4974121183

Scales and comparisons

• 221,991,770 seconds is equal to 7 years, 3 weeks, 8 hours, 22 minutes, 50 seconds.
• To count from 1 to 221,991,770 would take you about ten years!

  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 221991770 cubic inches would be around 50.5 feet tall.

Recreational maths with 221991770

• 221991770 backwards is 077199122
• The number of decimal digits it has is: 9
• The sum of 221991770's digits is 38
• More coming soon!