Primes / Is 171 prime?

Is 171 a Prime Number?

No171 = 3^2 x 19

171 is NOT prime: 3 × 57 = 171. That makes 3 a genuine divisor of 171 beyond 1 and 171 itself. Fully broken down, 171 = 3^2 × 19, for 6 divisors total. 171 sits between primes 167 and 173, 4 below and 2 above. 171: 3, 9 divide 171 evenly, checked against 2-12. 171 is odd, digit sum 9 for 171, digital root 9 for 171. 171 has 5 primes within 10 of 171.