Is 198 a prime number?

No, 198 is composite. It is divisible by 2, 3, 6, 9, 11, 18, 22, 33, 66 and 99.

Factors of 198

The factors of 198 are 1, 2, 3, 6, 9, 11, 18, 22, 33, 66, 99 and 198. That is 12 factors in total.

A factor of 198 is a whole number that divides 198 exactly, with no remainder. 198 is a composite number because it has factors other than 1 and itself.

Factor pairs of 198

Two numbers that multiply to give 198:

1 × 198 = 198
2 × 99 = 198
3 × 66 = 198
6 × 33 = 198
9 × 22 = 198
11 × 18 = 198

Prime factorization of 198

198 = 2 × 3 × 3 × 11 = 2 × 3² × 11. The prime factors of 198 are 2, 3 and 11.

Quick facts about 198

Is 198 prime? No.
Even or odd: even.
Sum of its factors: 1 + 2 + 3 + 6 + 9 + 11 + 18 + 22 + 33 + 66 + 99 + 198 = 468.

Factors of nearby numbers

Number	Factors
194	1, 2, 97, 194
195	1, 3, 5, 13, 15, 39, 65, 195
196	1, 2, 4, 7, 14, 28, 49, 98, 196
197	1, 197
199	1, 199
200	1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200
225	1, 3, 5, 9, 15, 25, 45, 75, 225
240	20 factors

More about 198: square root of 198 · 198 in binary.

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