81221267200

Names of 81221267200

• Cardinal: 81221267200 can be written as Eighty-one billion, two hundred twenty-one million, two hundred sixty-seven thousand, two hundred.

Scientific notation

• Scientific notation: 8.12212672 × 10¹⁰

Factors of 81221267200

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 1800

Divisors of 81221267200

• Number of divisors d(n): 216
• Complete list of divisors:
  1 2 4 5 8 10 16 17 20 25 32 34 40 50 64 68 80 85 100 128 136 160 170 200 256 272 320 340 400 425 544 640 680 683 800 850 1088 1093 1280 1360 1366 1600 1700 2176 2186 2720 2732 3200 3400 3415 4352 4372 5440 5464 5465 6400 6800 6830 8744 10880 10928 10930 11611 13600 13660 17075 17488 18581 21760 21856 21860 23222 27200 27320 27325 34150 34976 37162 43712 43720 46444 54400 54640 54650 58055 68300 69952 74324 87424 87440 92888 92905 108800 109280 109300 116110 136600 139904 148648 174848 174880 185776 185810 218560 218600 232220 273200 279808 290275 297296 349760 371552 371620 437120 437200 464440 464525 546400 580550 594592 699520 743104 743240 746519 874240 874400 928880 929050 1092800 1161100 1189184 1399040 1486208 1486480 1493038 1748800 1857760 1858100 2185600 2322200 2378368 2972416 2972960 2986076 3497600 3715520 3716200 3732595 4371200 4644400 4756736 5945920 5972152 6995200 7431040 7432400 7465190 9288800 11891840 11944304 12690823 14862080 14864800 14930380 18577600 18662975 23783680 23888608 25381646 29729600 29860760 37155200 37325950 47777216 50763292 59459200 59721520 63454115 74310400 74651900 95554432 101526584 118918400 119443040 126908230 149303800 191108864 203053168 238886080 253816460 298607600 317270575 406106336 477772160 507632920 597215200 634541150 812212672 955544320 1015265840 1194430400 1269082300 1624425344 2030531680 2388860800 2538164600 3248850688 4061063360 4777721600 5076329200 8122126720 10152658400 16244253440 20305316800 40610633600 81221267200
• Sum of all divisors σ(n): 213367624848
• Sum of proper divisors (its aliquot sum) s(n): 132146357648
• 81221267200 is an abundant number, because the sum of its proper divisors (132146357648) is greater than itself. Its abundance is 50925090448

Bases of 81221267200

• Binary: 1001011101001001010100010111100000000₂
• Hexadecimal: 0x12E92A2F00
• Base-36: 11B91MV4

Squares and roots of 81221267200

• 81221267200 squared (81221267200²) is 6596894245573795840000
• 81221267200 cubed (81221267200³) is 535808110209891689238888448000000
• The square root of 81221267200 is 284993.4511528293
• The cube root of 81221267200 is 4330.6849131771

Scales and comparisons

• 81,221,267,200 seconds is equal to 2,582 years, 30 weeks, 2 days, 23 hours, 6 minutes, 40 seconds.
• To count from 1 to 81,221,267,200 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 81221267200 cubic inches would be around 360.9 feet tall.

Recreational maths with 81221267200

• 81221267200 backwards is 00276212218
• The number of decimal digits it has is: 11
• The sum of 81221267200's digits is 31
• More coming soon!