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.
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The number 1 is neither composite nor prime.
Composite because it has more than two factors.
All even numbers greater than two are composite.
composite because it has more than two factors.
It is a prime number because its only factors are 1 and itself.