# 21217

## 21,217 is an odd composite number composed of two prime numbers multiplied together.

What does the number 21217 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 6 divisors.

21217 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of six divisors.

## Prime factorization of 21217:

### 72 × 433

(7 × 7 × 433)

See below for interesting mathematical facts about the number 21217 from the Numbermatics database.

### Names of 21217

• Cardinal: 21217 can be written as Twenty-one thousand, two hundred seventeen.

### Scientific notation

• Scientific notation: 2.1217 × 104

### Factors of 21217

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 440

### Divisors of 21217

• Number of divisors d(n): 6
• Complete list of divisors:
• Sum of all divisors σ(n): 24738
• Sum of proper divisors (its aliquot sum) s(n): 3521
• 21217 is a deficient number, because the sum of its proper divisors (3521) is less than itself. Its deficiency is 17696

### Bases of 21217

• Binary: 1010010111000012
• Base-36: GDD

### Squares and roots of 21217

• 21217 squared (212172) is 450161089
• 21217 cubed (212173) is 9551067825313
• The square root of 21217 is 145.6605643267
• The cube root of 21217 is 27.6839459163

### Scales and comparisons

How big is 21217?
• 21,217 seconds is equal to 5 hours, 53 minutes, 37 seconds.
• To count from 1 to 21,217 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 21217 cubic inches would be around 2.3 feet tall.

### Recreational maths with 21217

• 21217 backwards is 71212
• The number of decimal digits it has is: 5
• The sum of 21217's digits is 13
• More coming soon!

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The information we have on file for 21217 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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