81053331021

Names of 81053331021

• Cardinal: 81053331021 can be written as Eighty-one billion, fifty-three million, three hundred thirty-one thousand and twenty-one.

Scientific notation

• Scientific notation: 8.1053331021 × 10¹⁰

Factors of 81053331021

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 2081

Divisors of 81053331021

• Number of divisors d(n): 96
• Complete list of divisors:
  1 3 9 13 27 29 39 87 117 169 261 351 367 377 507 783 1101 1131 1521 1669 3303 3393 4563 4771 4901 5007 9909 10179 10643 14313 14703 15021 21697 31929 42939 44109 45063 48401 62023 65091 95787 128817 132327 138359 145203 186069 195273 282061 287361 415077 435609 558207 585819 612523 629213 846183 1245231 1306827 1674621 1798667 1837569 1887639 2538549 3735693 5396001 5512707 5662917 7615647 7962799 8179769 16188003 16538121 16988751 17763167 23888397 24539307 48564009 53289501 71665191 73617921 103516387 159868503 214995573 220853763 230921171 310549161 479605509 692763513 931647483 2078290539 2794942449 3001975223 6234871617 9005925669 27017777007 81053331021
• Sum of all divisors σ(n): 134957376000
• Sum of proper divisors (its aliquot sum) s(n): 53904044979
• 81053331021 is a deficient number, because the sum of its proper divisors (53904044979) is less than itself. Its deficiency is 27149286042

Bases of 81053331021

• Binary: 1001011011111001001111010111001001101₂
• Hexadecimal: 0x12DF27AE4D
• Base-36: 118H26H9

Squares and roots of 81053331021

• 81053331021 squared (81053331021²) is 6569642469599800902441
• 81053331021 cubed (81053331021³) is 532491405778092591941244899922261
• The square root of 81053331021 is 284698.6670516741
• The cube root of 81053331021 is 4327.6980907673

Scales and comparisons

• 81,053,331,021 seconds is equal to 2,577 years, 12 weeks, 5 days, 6 hours, 10 minutes, 21 seconds.
• To count from 1 to 81,053,331,021 would take you about five thousand, one hundred fifty-four 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 81053331021 cubic inches would be around 360.6 feet tall.

Recreational maths with 81053331021

• 81053331021 backwards is 12013335018
• 81053331021 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81053331021's digits is 27
• More coming soon!