21355209

21,355,209 is an odd composite number composed of three prime numbers multiplied together.

What does the number 21355209 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 12 divisors.

21355209 is an odd composite number. It is composed of three distinct prime numbers multiplied together. It has a total of twelve divisors.

Prime factorization of 21355209:

3² × 1033 × 2297

(3 × 3 × 1033 × 2297)

See below for interesting mathematical facts about the number 21355209 from the Numbermatics database.

Names of 21355209

Cardinal: 21355209 can be written as Twenty-one million, three hundred fifty-five thousand, two hundred nine.

Scientific notation

Scientific notation: 2.1355209 × 10⁷

Factors of 21355209

Number of distinct prime factors ω(n): 3
Total number of prime factors Ω(n): 4
Sum of prime factors: 3333

Divisors of 21355209

Number of divisors d(n): 12
Complete list of divisors:
1 3 9 1033 2297 3099 6891 9297 20673 2372801 7118403 21355209
Sum of all divisors σ(n): 30889716
Sum of proper divisors (its aliquot sum) s(n): 9534507
21355209 is a deficient number, because the sum of its proper divisors (9534507) is less than itself. Its deficiency is 11820702

Bases of 21355209

Binary: 1010001011101101011001001₂
Hexadecimal: 0x145DAC9
Base-36: CPPS9

Squares and roots of 21355209

21355209 squared (21355209²) is 456044951433681
21355209 cubed (21355209³) is 9738935251261107394329
The square root of 21355209 is 4621.1696571323
The cube root of 21355209 is 277.4392757317

Scales and comparisons

How big is 21355209?

21,355,209 seconds is equal to 35 weeks, 2 days, 4 hours, 9 seconds.
To count from 1 to 21,355,209 would take you about six 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 21355209 cubic inches would be around 23.1 feet tall.

Recreational maths with 21355209

21355209 backwards is 90255312
The number of decimal digits it has is: 8
The sum of 21355209's digits is 27
More coming soon!

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The information we have on file for 21355209 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!

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