# 253

## 253 is an odd composite number composed of two prime numbers multiplied together.

What does the number 253 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 4 divisors.

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

## Prime factorization of 253:

### 11 × 23

See below for interesting mathematical facts about the number 253 from the Numbermatics database.

### Names of 253

• Cardinal: 253 can be written as Two hundred fifty-three.

### Scientific notation

• Scientific notation: 2.53 × 102

### Factors of 253

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 34

### Divisors of 253

• Number of divisors d(n): 4
• Complete list of divisors:
• Sum of all divisors σ(n): 288
• Sum of proper divisors (its aliquot sum) s(n): 35
• 253 is a deficient number, because the sum of its proper divisors (35) is less than itself. Its deficiency is 218

### Bases of 253

• Binary: 111111012
• Base-36: 71

### Squares and roots of 253

• 253 squared (2532) is 64009
• 253 cubed (2533) is 16194277
• The square root of 253 is 15.9059737205
• The cube root of 253 is 6.3247035435

### Scales and comparisons

How big is 253?
• 253 seconds is equal to 4 minutes, 13 seconds.
• To count from 1 to 253 would take you about two minutes.

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 253 cubic inches would be around 0.5 feet tall.

### Recreational maths with 253

• 253 backwards is 352
• The number of decimal digits it has is: 3
• The sum of 253's digits is 10
• More coming soon!