7×31

7×31 denotes the product of the integers 7 and 31. It is equal to 217 and is an example of simple arithmetic multiplication.

Both factors are prime, making 217 a semiprime. Its prime factorization is 7 × 31. The positive divisors of 217 are 1, 7, 31, and 217.

In decimal notation, the value is 217. In other bases, it is 11011001 in binary and D9 in hexadecimal.

As a semiprime, 217 has exactly four divisors and is not divisible by any square other than 1. It is often used as a straightforward example in discussions of prime products and divisor counting.

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