# 243

## 243 is an odd composite number. It is composed of a single prime number multiplied by itself four times.

What does the number 243 look like?

This visualization shows the relationship between its 1 prime factors (large circles) and 6 divisors.

243 is an odd composite number. It is composed of one distinct prime number multiplied by itself four times. It has a total of six divisors.

## Prime factorization of 243:

### 35

(3 × 3 × 3 × 3 × 3)

See below for interesting mathematical facts about the number 243 from the Numbermatics database.

### Names of 243

• Cardinal: 243 can be written as Two hundred forty-three.

### Scientific notation

• Scientific notation: 2.43 × 102

### Factors of 243

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 3

### Divisors of 243

• Number of divisors d(n): 6
• Complete list of divisors:
• Sum of all divisors σ(n): 364
• Sum of proper divisors (its aliquot sum) s(n): 121
• 243 is a deficient number, because the sum of its proper divisors (121) is less than itself. Its deficiency is 122

### Bases of 243

• Binary: 111100112
• Base-36: 6R

### Squares and roots of 243

• 243 squared (2432) is 59049
• 243 cubed (2433) is 14348907
• The square root of 243 is 15.5884572681
• The cube root of 243 is 6.2402514691

### Scales and comparisons

How big is 243?
• 243 seconds is equal to 4 minutes, 3 seconds.
• To count from 1 to 243 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 243 cubic inches would be around 0.5 feet tall.

### Recreational maths with 243

• 243 backwards is 342
• 243 is a Harshad number.
• The number of decimal digits it has is: 3
• The sum of 243's digits is 9
• More coming soon!