531 is not a Prime number. Other than itself and one, it is also divisible by 3, 9, 59, and 177.
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531 is composite
531 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 are neither prime, nor composite.
The prime factorization of 531 is: 32 x 59
531 is an odd number.
All multiples of 531, which is an infinite number.