A day full of math games & activities. Find one near you.

Is 251 a Prime Number?

Is 251 a prime number? Numbers having only 2 factors, i.e. 1 and the number itself are known as prime numbers whereas numbers with more than 2 factors are known as composite. The answer to the question whether 251 is a prime or composite is - "251 is a prime number." Now, let us find out how and why is 251 a prime number or a composite number?

Is 251 a prime number? - Yes
Is 251 a composite number? - No
Prime Factors of 251 - 251
Is 251 a perfect square? - No
Factors of 251 - 1, 251

Yes, 251 is a prime number. The number 251 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 251 has exactly two factors, i.e. 1 and 251, it is a prime number.

Is 251 a Prime or Composite?

How is 251 a Prime Number?

To understand whether 251 is composite or prime, it is important to find its factors.

Factors of 251: 1, 251

Therefore, we can say that 251 is a prime number since it has only 2 factors.

☛ Prime Number Calculator

Is 251 a Composite Number?

No, since 251 has only two factors, i.e. 1 and 251. In other words, 251 is not a composite number because 251 doesn’t have more than 2 factors.

Problem Statements:

Is 251 a Prime Number?	Yes
Is 251 a Composite Number?	No
Multiples of 251	251, 502, 753, 1004, 1255, 1506, 1757, 2008, 2259, 2510
Is 251 a Perfect Square?	No
Is 251 an Odd Number?	Yes
Cube Root of 251	6.307982
Is 251 a Perfect Cube?	No
Square Root of 251	15.842980
Is 251 an Even Number?	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
Numbers X and Y are said to be coprime if they have only one common factor that is 1.
A pair of prime numbers X and Y are said to be twin prime numbers if the absolute difference between them is 2. Example - (41, 43) are twin prime numbers.

☛ Also Check: