21556

Names of 21556

• Cardinal: 21556 can be written as Twenty-one thousand, five hundred fifty-six.

Scientific notation

• Scientific notation: 2.1556 × 10⁴

Factors of 21556

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 336

Divisors of 21556

• Number of divisors d(n): 12
• Complete list of divisors:
  1 2 4 17 34 68 317 634 1268 5389 10778 21556
• Sum of all divisors σ(n): 40068
• Sum of proper divisors (its aliquot sum) s(n): 18512
• 21556 is a deficient number, because the sum of its proper divisors (18512) is less than itself. Its deficiency is 3044

Bases of 21556

• Binary: 101010000110100₂
• Hexadecimal: 0x5434
• Base-36: GMS

Squares and roots of 21556

• 21556 squared (21556²) is 464661136
• 21556 cubed (21556³) is 10016235447616
• The square root of 21556 is 146.8196172179
• The cube root of 21556 is 27.8306099701

Scales and comparisons

• 21,556 seconds is equal to 5 hours, 59 minutes, 16 seconds.
• To count from 1 to 21,556 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 21556 cubic inches would be around 2.3 feet tall.

Recreational maths with 21556

• 21556 backwards is 65512
• The number of decimal digits it has is: 5
• The sum of 21556's digits is 19
• More coming soon!