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Is 31 a Prime Number?

Is 31 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 31 is a prime number or composite, we need to divide it with numbers from 1 to 31. To find out the answer to this question "is 31 is a prime number" and to gain a detailed understanding of "how and why is 31 a prime number?" Let's learn more.

Is 31 a prime number? - Yes
Is 31 a composite number? - No
Factors of 31 - 1, 31
Is 31 a perfect square? - No
Prime Factors of 31 - 31

Yes, 31 is a prime number. The number 31 is divisible only by 1 and the number itself. For a number to be classified as a prime number, it should have exactly two factors. Since 31 has exactly two factors, i.e. 1 and 31, it is a prime number.

Is 31 a Prime or Composite?

How is 31 a Prime Number?

To understand whether 31 is prime or composite, it is important to find its factors.

Factors of 31: 1, 31

Therefore, we can say that 31 is a prime number since it has only 2 factors.

☛ Prime Number Calculator

Is 31 a Composite Number?

No, since 31 has only two factors, i.e. 1 and 31. In other words, 31 is not a composite number because 31 doesn’t have more than 2 factors.

Problem Statements:

Is 31 a Prime Number?	Yes
Is 31 a Composite Number?	No
Is 31 an Odd Number?	Yes
Is 31 a Perfect Square?	No
Multiples of 31	31, 62, 93, 124, 155, 186, 217, 248, 279, 310
Cube Root of 31	3.141377
Square Root of 31	5.567764
Is 31 an Even Number?	No
Is 31 a Perfect Cube?	No

Fun Facts:

A palindrome prime is a prime number that when read in reverse order results in the same number. Examples - 787, 373, 353
A semiprime number is a composite number that is the product of exactly two prime numbers. Example - 697 is semiprime, since 697 can be written as 17 × 41.
A perfect cube is always a composite number.

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