Is 171 a prime number?

No, 171 is composite. It is divisible by 3, 9, 19 and 57.

Factors of 171

The factors of 171 are 1, 3, 9, 19, 57 and 171. That is 6 factors in total.

A factor of 171 is a whole number that divides 171 exactly, with no remainder. 171 is a composite number because it has factors other than 1 and itself.

Factor pairs of 171

Two numbers that multiply to give 171:

1 × 171 = 171
3 × 57 = 171
9 × 19 = 171

Prime factorization of 171

171 = 3 × 3 × 19 = 3² × 19. The prime factors of 171 are 3 and 19.

Quick facts about 171

Is 171 prime? No.
Even or odd: odd.
Sum of its factors: 1 + 3 + 9 + 19 + 57 + 171 = 260.

Factors of nearby numbers

Number	Factors
167	1, 167
168	16 factors
169	1, 13, 169
170	1, 2, 5, 10, 17, 34, 85, 170
172	1, 2, 4, 43, 86, 172
173	1, 173
174	1, 2, 3, 6, 29, 58, 87, 174
175	1, 5, 7, 25, 35, 175

More about 171: square root of 171 · 171 in binary.

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