21312

Names of 21312

• Cardinal: 21312 can be written as Twenty-one thousand, three hundred twelve.

Scientific notation

• Scientific notation: 2.1312 × 10⁴

Factors of 21312

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 42

Divisors of 21312

• Number of divisors d(n): 42
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 32 36 37 48 64 72 74 96 111 144 148 192 222 288 296 333 444 576 592 666 888 1184 1332 1776 2368 2664 3552 5328 7104 10656 21312
• Sum of all divisors σ(n): 62738
• Sum of proper divisors (its aliquot sum) s(n): 41426
• 21312 is an abundant number, because the sum of its proper divisors (41426) is greater than itself. Its abundance is 20114

Bases of 21312

• Binary: 101001101000000₂
• Hexadecimal: 0x5340
• Base-36: GG0

Squares and roots of 21312

• 21312 squared (21312²) is 454201344
• 21312 cubed (21312³) is 9679939043328
• The square root of 21312 is 145.9863007273
• The cube root of 21312 is 27.7252030737

Scales and comparisons

• 21,312 seconds is equal to 5 hours, 55 minutes, 12 seconds.
• To count from 1 to 21,312 would take you about five hours.

  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 21312 cubic inches would be around 2.3 feet tall.

Recreational maths with 21312

• 21312 is the same when its digits are reversed! That makes it a palindromic number.
• 21312 is a Harshad number.
• The number of decimal digits it has is: 5
• The sum of 21312's digits is 9
• More coming soon!