21148221

Names of 21148221

• Cardinal: 21148221 can be written as Twenty-one million, one hundred forty-eight thousand, two hundred twenty-one.

Scientific notation

• Scientific notation: 2.1148221 × 10⁷

Factors of 21148221

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 309

Divisors of 21148221

• Number of divisors d(n): 32
• Complete list of divisors:
  1 3 17 29 51 79 87 181 237 493 543 1343 1479 2291 3077 4029 5249 6873 9231 14299 15747 38947 42897 89233 116841 243083 267699 414671 729249 1244013 7049407 21148221
• Sum of all divisors σ(n): 31449600
• Sum of proper divisors (its aliquot sum) s(n): 10301379
• 21148221 is a deficient number, because the sum of its proper divisors (10301379) is less than itself. Its deficiency is 10846842

Bases of 21148221

• Binary: 1010000101011001000111101₂
• Hexadecimal: 0x142B23D
• Base-36: CLA2L

Squares and roots of 21148221

• 21148221 squared (21148221²) is 447247251464841
• 21148221 cubed (21148221³) is 9458483715621031197861
• The square root of 21148221 is 4598.7194956857
• The cube root of 21148221 is 276.5399924931

Scales and comparisons

• 21,148,221 seconds is equal to 34 weeks, 6 days, 18 hours, 30 minutes, 21 seconds.
• To count from 1 to 21,148,221 would take you about three days!

  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 21148221 cubic inches would be around 23 feet tall.

Recreational maths with 21148221

• 21148221 backwards is 12284112
• The number of decimal digits it has is: 8
• The sum of 21148221's digits is 21
• More coming soon!