# 21175

## 21,175 is an odd composite number composed of three prime numbers multiplied together.

What does the number 21175 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 18 divisors.

21175 is an odd composite number. It is composed of three distinct prime numbers multiplied together. It has a total of eighteen divisors.

## Prime factorization of 21175:

### 52 × 7 × 112

(5 × 5 × 7 × 11 × 11)

See below for interesting mathematical facts about the number 21175 from the Numbermatics database.

### Names of 21175

• Cardinal: 21175 can be written as Twenty-one thousand, one hundred seventy-five.

### Scientific notation

• Scientific notation: 2.1175 × 104

### Factors of 21175

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 23

### Divisors of 21175

• Number of divisors d(n): 18
• Complete list of divisors:
• Sum of all divisors σ(n): 32984
• Sum of proper divisors (its aliquot sum) s(n): 11809
• 21175 is a deficient number, because the sum of its proper divisors (11809) is less than itself. Its deficiency is 9366

### Bases of 21175

• Binary: 1010010101101112
• Base-36: GC7

### Squares and roots of 21175

• 21175 squared (211752) is 448380625
• 21175 cubed (211753) is 9494459734375
• The square root of 21175 is 145.5163221085
• The cube root of 21175 is 27.6656666467

### Scales and comparisons

How big is 21175?
• 21,175 seconds is equal to 5 hours, 52 minutes, 55 seconds.
• To count from 1 to 21,175 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 21175 cubic inches would be around 2.3 feet tall.

### Recreational maths with 21175

• 21175 backwards is 57112
• The number of decimal digits it has is: 5
• The sum of 21175's digits is 16
• More coming soon!