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A Prime number is a number with two and only two factors: 1 (also known as unity) and itself. A composite number is a number with more than two factors; in other words, it has at least one factor besides 1 and itself. 231 has factors other than 1 and itself, so it is not a prime number. For example, it is divisible by 3. (You can check this by adding the digits of the number: 2 + 3 + 1 = 6. If the sum of the digits is divisible by 3, the number is also divisible by 3.) Therefore, 231 is a composite number.

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โˆ™ 2009-10-26 03:14:14
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Q: Is 231 a prime number or a composite number?
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Related questions

Is 231 prime or composite?

231 is a composite number. A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 have a different name.


Is 231 prime or composite and explain?

231 is a composite number. This is because composite numbers are any number that has more than two factors(one and itself). Therefore, since 3, 7, and 11 to name a few are factors of 231 that makes it a composite number.


What are the composite number for 231?

The composite factors of 231 are 21, 33, 77, 231


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It is a composite number.


Is the number 231 a prime number?

231 is NOT a prime number. It is divisible by 3, 7 and 11.


Is the number 231 a composite number?

Yes, it is.


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It is not a prime number, it is a composite number.


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It is a composite number, not a prime number.


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It is not a prime number, it is a composite number.


Are all prime numbers composite no?

no. There is a prime number and a composite number. Therefor, all prime numbers are not composite.


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A prime number has two factors, a composite number has more than two.


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No 168 is not a prime number it is a composite number


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There is no number that is prime and composite - the two are opposites.


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It isn't prime or composite.


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Is 293 a composite or a prime number?


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There is not such a thing as a composite prime number. A prime number has exactly two factors. A composite number has more than two factors.


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It is a prime number, and therefore not a composite number.251 is prime.


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Prime or composite! composite is not the answer da


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86 is not a prime number, so is a composite.


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It is divisible by 3.