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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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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 17 prime or composite number?
It is prime
Is 86 a prime or composite number?
86 is not a prime number, so is a composite.
Is 168 a prime or a composite number?
No 168 is not a prime number it is a composite number
Is 2401 a prime or composite number?
composite
