Is 57 a Prime Number?

Is 57 a prime number? A prime number is divisible only by 1 and itself, which means it has no other divisor except 1 and the number itself. On the contrary, composite numbers have more than two factors. To determine if 57 is a prime number or composite, we need to divide it with numbers from 1 to 57. To find out the answer to this question "is 57 is a prime number" and to gain a detailed understanding of "how and why is 57 a prime number or a composite number?" Let's learn more.

• Is 57 a prime number? - No
• Is 57 a composite number? - Yes
• Is 57 a perfect square? - No
• Factors of 57 - 1, 3, 19, 57
• Prime Factors of 57 - 3, 19

Is 57 a Prime Number?

No, 57 is not a prime number. The number 57 is divisible by 1, 3, 19, 57. For a number to be classified as a prime number, it should have exactly two factors. Since 57 has more than two factors, i.e. 1, 3, 19, 57, it is not a prime number.

Why is 57 not a Prime Number?

To understand whether 57 is composite or prime, it is important to find its factors.

Factors of 57: 1, 3, 19, 57

Since 57 has more than 2 factors, we can say that 57 is not a prime number.

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Is 57 a Composite Number?

Yes, since 57 has more than two factors i.e. 1, 3, 19, 57. In other words, 57 is a composite number because 57 has more than 2 factors.

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Fun Facts:

• A perfect square (square number) is always a composite number.
• A semiprime number is a composite number that is the product of exactly two prime numbers. Example - 611 is semiprime, since 611 can be written as 13 × 47.
• 23 is the smallest prime number having consecutive digits.

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