21031289

Names of 21031289

• Cardinal: 21031289 can be written as Twenty-one million, thirty-one thousand, two hundred eighty-nine.

Scientific notation

• Scientific notation: 2.1031289 × 10⁷

Factors of 21031289

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 21031289

Divisors of 21031289

• Number of divisors d(n): 2
• Complete list of divisors:
  1 21031289
• Sum of all divisors σ(n): 21031290
• Sum of proper divisors (its aliquot sum) s(n): 1
• 21031289 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 21031288

Bases of 21031289

• Binary: 1010000001110100101111001₂
• Hexadecimal: 0x140E979
• Base-36: CIRUH

Squares and roots of 21031289

• 21031289 squared (21031289²) is 442315117001521
• 21031289 cubed (21031289³) is 9302457054727801590569
• The square root of 21031289 is 4585.9883340453
• The cube root of 21031289 is 276.0293718303

Scales and comparisons

• 21,031,289 seconds is equal to 34 weeks, 5 days, 10 hours, 1 minute, 29 seconds.
• To count from 1 to 21,031,289 would take you about three 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 21031289 cubic inches would be around 23 feet tall.

Recreational maths with 21031289

• 21031289 backwards is 98213012
• 21031289 is a twin prime! Its twin is 21031291
• The number of decimal digits it has is: 8
• The sum of 21031289's digits is 26
• More coming soon!