81220472200

Names of 81220472200

• Cardinal: 81220472200 can be written as Eighty-one billion, two hundred twenty million, four hundred seventy-two thousand, two hundred.

Scientific notation

• Scientific notation: 8.12204722 × 10¹⁰

Factors of 81220472200

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 58014637

Divisors of 81220472200

• Number of divisors d(n): 48
• Complete list of divisors:
  1 2 4 5 7 8 10 14 20 25 28 35 40 50 56 70 100 140 175 200 280 350 700 1400 58014623 116029246 232058492 290073115 406102361 464116984 580146230 812204722 1160292460 1450365575 1624409444 2030511805 2320584920 2900731150 3248818888 4061023610 5801462300 8122047220 10152559025 11602924600 16244094440 20305118050 40610236100 81220472200
• Sum of all divisors σ(n): 215814401280
• Sum of proper divisors (its aliquot sum) s(n): 134593929080
• 81220472200 is an abundant number, because the sum of its proper divisors (134593929080) is greater than itself. Its abundance is 53373456880

Bases of 81220472200

• Binary: 1001011101001000111100000110110001000₂
• Hexadecimal: 0x12E91E0D88
• Base-36: 11B8KLFS

Squares and roots of 81220472200

• 81220472200 squared (81220472200²) is 6596765104390972840000
• 81220472200 cubed (81220472200³) is 535792376771117107482175048000000
• The square root of 81220472200 is 284992.0563805245
• The cube root of 81220472200 is 4330.6707834387

Scales and comparisons

• 81,220,472,200 seconds is equal to 2,582 years, 29 weeks, 18 hours, 16 minutes, 40 seconds.
• To count from 1 to 81,220,472,200 would take you about five thousand, one hundred sixty-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 81220472200 cubic inches would be around 360.9 feet tall.

Recreational maths with 81220472200

• 81220472200 backwards is 00227402218
• 81220472200 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81220472200's digits is 28
• More coming soon!