Is 511 a prime number?

No, 511 is not a prime number. It is a composite number: 511 = 7 × 73.

Why 511 is not prime

511 has divisors other than 1 and itself. The smallest is 7: 511 ÷ 7 = 73.

Prime factorization: 511 = 7 × 73.

Quick facts about 511

Is it prime? Nearby numbers

NumberPrime?
498No, 2 × 3 × 83
499Yes
500No, 2 × 2 × 5 × 5 × 5
501No, 3 × 167
521Yes
539No, 7 × 7 × 11
541Yes
561No, 3 × 11 × 17

Another number? Use the prime number checker for any value, or see the list of prime numbers.