81323200
81,323,200 is an even composite number composed of five prime numbers multiplied together.
81323200 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred sixty-eight divisors.
Prime factorization of 81323200:
26 × 52 × 7 × 53 × 137
(2 × 2 × 2 × 2 × 2 × 2 × 5 × 5 × 7 × 53 × 137)See below for interesting mathematical facts about the number 81323200 from the Numbermatics database.
Names of 81323200
- Cardinal: 81323200 can be written as Eighty-one million, three hundred twenty-three thousand, two hundred.
Scientific notation
- Scientific notation: 8.13232 × 107
Factors of 81323200
Divisors of 81323200
- Number of divisors d(n): 168
-
Complete list of divisors:
1 2 4 5 7 8 10 14 16 20 25 28 32 35 40 50 53 56 64 70 80 100 106 112 137 140 160 175 200 212 224 265 274 280 320 350 371 400 424 448 530 548 560 685 700 742 800 848 959 1060 1096 1120 1325 1370 1400 1484 1600 1696 1855 1918 2120 2192 2240 2650 2740 2800 2968 3392 3425 3710 3836 4240 4384 4795 5300 5480 5600 5936 6850 7261 7420 7672 8480 8768 9275 9590 10600 10960 11200 11872 13700 14522 14840 15344 16960 18550 19180 21200 21920 23744 23975 27400 29044 29680 30688 36305 37100 38360 42400 43840 47950 50827 54800 58088 59360 61376 72610 74200 76720 84800 95900 101654 109600 116176 118720 145220 148400 153440 181525 191800 203308 219200 232352 254135 290440 296800 306880 363050 383600 406616 464704 508270 580880 593600 726100 767200 813232 1016540 1161760 1270675 1452200 1534400 1626464 2033080 2323520 2541350 2904400 3252928 4066160 5082700 5808800 8132320 10165400 11617600 16264640 20330800 40661600 81323200
- Sum of all divisors σ(n): 234708192
- Sum of proper divisors (its aliquot sum) s(n): 153384992
- 81323200 is an abundant number, because the sum of its proper divisors (153384992) is greater than itself. Its abundance is 72061792
Bases of 81323200
- Binary: 1001101100011100100110000002
- Hexadecimal: 0x4D8E4C0
- Base-36: 1CF1DS
Squares and roots of 81323200
- 81323200 squared (813232002) is 6613462858240000
- 81323200 cubed (813232003) is 537827962713223168000000
-
The
square root of 81323200 is 9017.9376799797 -
The
cube root of 81323200 is 433.2495827625
Scales and comparisons
How big is 81323200?- 81,323,200 seconds is equal to 2 years, 30 weeks, 3 days, 5 hours, 46 minutes, 40 seconds.
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To count from 1 to 81,323,200 would take you about three 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 81323200 cubic inches would be around 36.1 feet tall.
Recreational maths with 81323200
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