# 247

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

What does the number 247 look like?

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

247 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 247:

### 13 × 19

See below for interesting mathematical facts about the number 247 from the Numbermatics database.

### Names of 247

• Cardinal: 247 can be written as Two hundred forty-seven.

### Scientific notation

• Scientific notation: 2.47 × 102

### Factors of 247

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 32

### Divisors of 247

• Number of divisors d(n): 4
• Complete list of divisors:
• Sum of all divisors σ(n): 280
• Sum of proper divisors (its aliquot sum) s(n): 33
• 247 is a deficient number, because the sum of its proper divisors (33) is less than itself. Its deficiency is 214

### Bases of 247

• Binary: 111101112
• Hexadecimal: 0xF7
• Base-36: 6V

### Squares and roots of 247

• 247 squared (2472) is 61009
• 247 cubed (2473) is 15069223
• The square root of 247 is 15.7162336455
• The cube root of 247 is 6.2743053575

### Scales and comparisons

How big is 247?
• 247 seconds is equal to 4 minutes, 7 seconds.
• To count from 1 to 247 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 247 cubic inches would be around 0.5 feet tall.

### Recreational maths with 247

• 247 backwards is 742
• 247 is a Harshad number.
• The number of decimal digits it has is: 3
• The sum of 247's digits is 13
• More coming soon!

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The information we have on file for 247 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!

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