# 21525

## 21,525 is an odd composite number composed of four prime numbers multiplied together.

What does the number 21525 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 24 divisors.

21525 is an odd composite number. It is composed of four distinct prime numbers multiplied together. It has a total of twenty-four divisors.

## Prime factorization of 21525:

### 3 × 52 × 7 × 41

(3 × 5 × 5 × 7 × 41)

See below for interesting mathematical facts about the number 21525 from the Numbermatics database.

### Names of 21525

• Cardinal: 21525 can be written as Twenty-one thousand, five hundred twenty-five.

### Scientific notation

• Scientific notation: 2.1525 × 104

### Factors of 21525

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 56

### Divisors of 21525

• Number of divisors d(n): 24
• Complete list of divisors:
• Sum of all divisors σ(n): 41664
• Sum of proper divisors (its aliquot sum) s(n): 20139
• 21525 is a deficient number, because the sum of its proper divisors (20139) is less than itself. Its deficiency is 1386

### Bases of 21525

• Binary: 1010100000101012
• Base-36: GLX

### Squares and roots of 21525

• 21525 squared (215252) is 463325625
• 21525 cubed (215253) is 9973084078125
• The square root of 21525 is 146.7140075113
• The cube root of 21525 is 27.8172623665

### Scales and comparisons

How big is 21525?
• 21,525 seconds is equal to 5 hours, 58 minutes, 45 seconds.
• To count from 1 to 21,525 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 21525 cubic inches would be around 2.3 feet tall.

### Recreational maths with 21525

• 21525 backwards is 52512
• 21525 is a Harshad number.
• The number of decimal digits it has is: 5
• The sum of 21525's digits is 15
• More coming soon!