216

Names of 216

• Cardinal: 216 can be written as Two hundred sixteen.

Scientific notation

• Scientific notation: 2.16 × 10²

Factors of 216

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 5

Divisors of 216

• Number of divisors d(n): 16
• Complete list of divisors:
  1 2 3 4 6 8 9 12 18 24 27 36 54 72 108 216
• Sum of all divisors σ(n): 600
• Sum of proper divisors (its aliquot sum) s(n): 384
• 216 is an abundant number, because the sum of its proper divisors (384) is greater than itself. Its abundance is 168

Bases of 216

• Binary: 11011000₂
• Hexadecimal: 0xD8
• Base-36: 60

Squares and roots of 216

• 216 squared (216²) is 46656
• 216 cubed (216³) is 10077696
• The square root of 216 is 14.6969384567
• 216 is a perfect cube number. Its cube root is 6

Scales and comparisons

• 216 seconds is equal to 3 minutes, 36 seconds.
• To count from 1 to 216 would take you about forty-eight seconds.

  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 216 cubic inches would be around 0.5 feet tall.

Recreational maths with 216

• 216 backwards is 612
• 216 is a Harshad number.
• The number of decimal digits it has is: 3
• The sum of 216's digits is 9
• More coming soon!