7213957821

Names of 7213957821

• Cardinal: 7213957821 can be written as Seven billion, two hundred thirteen million, nine hundred fifty-seven thousand, eight hundred twenty-one.

Scientific notation

• Scientific notation: 7.213957821 × 10⁹

Factors of 7213957821

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 616

Divisors of 7213957821

• Number of divisors d(n): 96
• Complete list of divisors:
  1 3 7 9 21 27 37 49 63 111 147 189 259 333 343 441 569 777 999 1029 1323 1369 1707 1813 2331 3087 3983 4107 5121 5439 6993 9261 9583 11949 12321 12691 15363 16317 21053 27881 28749 35847 36963 38073 48951 63159 67081 83643 86247 107541 114219 147371 189477 195167 201243 250929 258741 342657 442113 469567 568431 585501 603729 752787 778961 1031597 1326339 1408701 1756503 1811187 2336883 3094791 3979017 4226103 5269509 5452727 7010649 7221179 9284373 12678309 16358181 21031947 21663537 27853119 38169089 49074543 64990611 114507267 147223629 194971833 267183623 343521801 801550869 1030565403 2404652607 7213957821
• Sum of all divisors σ(n): 12831840000
• Sum of proper divisors (its aliquot sum) s(n): 5617882179
• 7213957821 is a deficient number, because the sum of its proper divisors (5617882179) is less than itself. Its deficiency is 1596075642

Bases of 7213957821

• Binary: 110101101111111000100001010111101₂
• Hexadecimal: 0x1ADFC42BD
• Base-36: 3BB05H9

Squares and roots of 7213957821

• 7213957821 squared (7213957821²) is 52041187443167068041
• 7213957821 cubed (7213957821³) is 375422931169762063504011098661
• The square root of 7213957821 is 84935.0211691267
• The cube root of 7213957821 is 1932.2257533929

Scales and comparisons

• 7,213,957,821 seconds is equal to 229 years, 19 weeks, 5 days, 21 hours, 10 minutes, 21 seconds.
• To count from 1 to 7,213,957,821 would take you about four hundred fifty-eight 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 7213957821 cubic inches would be around 161 feet tall.

Recreational maths with 7213957821

• 7213957821 backwards is 1287593127
• The number of decimal digits it has is: 10
• The sum of 7213957821's digits is 45
• More coming soon!