# 21555072

## 21,555,072 is an even composite number composed of four prime numbers multiplied together.

What does the number 21555072 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 256 divisors.

21555072 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of two hundred fifty-six divisors.

## Prime factorization of 21555072:

### 27 × 37 × 7 × 11

(2 × 2 × 2 × 2 × 2 × 2 × 2 × 3 × 3 × 3 × 3 × 3 × 3 × 3 × 7 × 11)

See below for interesting mathematical facts about the number 21555072 from the Numbermatics database.

### Names of 21555072

• Cardinal: 21555072 can be written as Twenty-one million, five hundred fifty-five thousand and seventy-two.

### Scientific notation

• Scientific notation: 2.1555072 × 107

### Factors of 21555072

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 16
• Sum of prime factors: 23

### Divisors of 21555072

• Number of divisors d(n): 256
• Complete list of divisors:
• Sum of all divisors σ(n): 80294400
• Sum of proper divisors (its aliquot sum) s(n): 58739328
• 21555072 is an abundant number, because the sum of its proper divisors (58739328) is greater than itself. Its abundance is 37184256

### Bases of 21555072

• Binary: 10100100011100111100000002
• Base-36: CU000

### Squares and roots of 21555072

• 21555072 squared (215550722) is 464621128925184
• 21555072 cubed (215550723) is 10014941886703623733248
• The square root of 21555072 is 4642.7440162043
• The cube root of 21555072 is 278.3021058907

### Scales and comparisons

How big is 21555072?
• 21,555,072 seconds is equal to 35 weeks, 4 days, 11 hours, 31 minutes, 12 seconds.
• To count from 1 to 21,555,072 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 21555072 cubic inches would be around 23.2 feet tall.

### Recreational maths with 21555072

• 21555072 backwards is 27055512
• 21555072 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21555072's digits is 27
• More coming soon!