31389218343576981

Names of 31389218343576981

• Cardinal: 31389218343576981 can be written as Thirty-one quadrillion, three hundred eighty-nine trillion, two hundred eighteen billion, three hundred forty-three million, five hundred seventy-six thousand, nine hundred eighty-one.

Scientific notation

• Scientific notation: 3.1389218343576981 × 10¹⁶

Factors of 31389218343576981

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 185945324

Divisors of 31389218343576981

• Number of divisors d(n): 32
• Complete list of divisors:
  1 3 9 27 29 87 261 783 215843 647529 1942587 5827761 6259447 18778341 56335023 169005069 185729449 557188347 1671565041 5014695123 5386154021 16158462063 48475386189 145426158567 40088401460507 120265204381521 360795613144563 1082386839433689 1162563642354703 3487690927064109 10463072781192327 31389218343576981
• Sum of all divisors σ(n): 48106304886960000
• Sum of proper divisors (its aliquot sum) s(n): 16717086543383019
• 31389218343576981 is a deficient number, because the sum of its proper divisors (16717086543383019) is less than itself. Its deficiency is 14672131800193962

Bases of 31389218343576981

• Binary: 1101111100001000101001111101001001001010110010110010101₂
• Hexadecimal: 0x6F8453E9256595
• Base-36: 8L2JRU45XN9

Squares and roots of 31389218343576981

• 31389218343576981 squared (31389218343576981²) is 985283028220749630826857873074361
• 31389218343576981 cubed (31389218343576981³) is 30927264103041830552066721749303809386668140884141
• The square root of 31389218343576981 is 177170026.6511719555
• The cube root of 31389218343576981 is 315447.3139137387

Scales and comparisons

• 31,389,218,343,576,981 seconds is equal to 998,080,050 years, 5 weeks, 20 hours, 16 minutes, 21 seconds.
• To count from 1 to 31,389,218,343,576,981 would take you about two billion, nine hundred ninety-four million, two hundred forty thousand, one hundred fifty 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 31389218343576981 cubic inches would be around 26287.3 feet tall.

Recreational maths with 31389218343576981

• 31389218343576981 backwards is 18967534381298313
• The number of decimal digits it has is: 17
• The sum of 31389218343576981's digits is 81
• More coming soon!