31228906821

Names of 31228906821

• Cardinal: 31228906821 can be written as Thirty-one billion, two hundred twenty-eight million, nine hundred six thousand, eight hundred twenty-one.

Scientific notation

• Scientific notation: 3.1228906821 × 10¹⁰

Factors of 31228906821

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 234

Divisors of 31228906821

• Number of divisors d(n): 144
• Complete list of divisors:
  1 3 7 21 31 43 49 53 93 97 129 147 159 217 291 301 371 651 679 903 961 1113 1333 1519 1643 2037 2107 2279 2597 2883 3007 3999 4171 4557 4753 4929 5141 6321 6727 6837 7791 9021 9331 11501 12513 14259 15423 15953 20181 21049 27993 29197 34503 35987 41323 47089 47859 50933 63147 65317 70649 80507 87591 93217 107961 111671 123969 129301 141267 147343 152799 159371 195951 204379 211947 221063 241521 251909 279651 289261 335013 356531 387903 442029 478113 494543 613137 652519 663189 755727 867783 905107 1069593 1115597 1483629 1547441 1957557 2024827 2190119 2495717 2715321 3346791 3461801 4008331 4567633 4642323 4940501 6074481 6335749 6570357 6852953 7487151 7809179 10385403 10832087 12024993 13702899 14821503 15330833 19007247 20558859 23427537 28058317 32496261 34583507 45992499 47970671 84174951 103750521 107315831 143912013 196408219 212441543 242084549 321947493 335794697 589224657 637324629 726253647 1007384091 1487090801 4461272403 10409635607 31228906821
• Sum of all divisors σ(n): 52717718592
• Sum of proper divisors (its aliquot sum) s(n): 21488811771
• 31228906821 is a deficient number, because the sum of its proper divisors (21488811771) is less than itself. Its deficiency is 9740095050

Bases of 31228906821

• Binary: 11101000101011000110100110101000101₂
• Hexadecimal: 0x745634D45
• Base-36: ECGVUPX

Squares and roots of 31228906821

• 31228906821 squared (31228906821²) is 975244621234700326041
• 31228906821 cubed (31228906821³) is 30455823404219894453792708825661
• The square root of 31228906821 is 176717.0247061669
• The cube root of 31228906821 is 3149.0937788211

Scales and comparisons

• 31,228,906,821 seconds is equal to 992 years, 51 weeks, 16 hours, 20 minutes, 21 seconds.
• To count from 1 to 31,228,906,821 would take you about one thousand, nine hundred eighty-five 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 31228906821 cubic inches would be around 262.4 feet tall.

Recreational maths with 31228906821

• 31228906821 backwards is 12860982213
• The number of decimal digits it has is: 11
• The sum of 31228906821's digits is 42
• More coming soon!