21991571000

Names of 21991571000

• Cardinal: 21991571000 can be written as Twenty-one billion, nine hundred ninety-one million, five hundred seventy-one thousand.

Scientific notation

• Scientific notation: 2.1991571 × 10¹⁰

Factors of 21991571000

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 7460

Divisors of 21991571000

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 4 5 7 8 10 14 20 25 28 35 40 50 56 70 100 125 140 175 200 250 280 350 449 500 700 875 898 1000 1400 1750 1796 2245 3143 3500 3592 4490 6286 6997 7000 8980 11225 12572 13994 15715 17960 22450 25144 27988 31430 34985 44900 48979 55976 56125 62860 69970 78575 89800 97958 112250 125720 139940 157150 174925 195916 224500 244895 279880 314300 349850 391832 392875 449000 489790 628600 699700 785750 874625 979580 1224475 1399400 1571500 1749250 1959160 2448950 3141653 3143000 3498500 4897900 6122375 6283306 6997000 9795800 12244750 12566612 15708265 21991571 24489500 25133224 31416530 43983142 48979000 62833060 78541325 87966284 109957855 125666120 157082650 175932568 219915710 314165300 392706625 439831420 549789275 628330600 785413250 879662840 1099578550 1570826500 2199157100 2748946375 3141653000 4398314200 5497892750 10995785500 21991571000
• Sum of all divisors σ(n): 58951152000
• Sum of proper divisors (its aliquot sum) s(n): 36959581000
• 21991571000 is an abundant number, because the sum of its proper divisors (36959581000) is greater than itself. Its abundance is 14968010000

Bases of 21991571000

• Binary: 10100011110110011001011111000111000₂
• Hexadecimal: 0x51ECCBE38
• Base-36: A3P7OS8

Squares and roots of 21991571000

• 21991571000 squared (21991571000²) is 483629195048041000000
• 21991571000 cubed (21991571000³) is 10635765780571842062411000000000
• The square root of 21991571000 is 148295.5528665645
• The cube root of 21991571000 is 2801.6814305567

Scales and comparisons

• 21,991,571,000 seconds is equal to 699 years, 13 weeks, 5 days, 1 hour, 43 minutes, 20 seconds.
• To count from 1 to 21,991,571,000 would take you about one thousand, three hundred ninety-eight 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 21991571000 cubic inches would be around 233.5 feet tall.

Recreational maths with 21991571000

• 21991571000 backwards is 00017519912
• 21991571000 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 21991571000's digits is 35
• More coming soon!