# 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

## Is 251 a Prime Number?

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.

## 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.

## 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: **

- Is 106 a Prime Number? - No
- Is 3 a Prime Number? - Yes
- Is 99 a Prime Number? - No
- Is 42 a Prime Number? - No
- Is 999 a Prime Number? - No
- Is 22 a Prime Number? - No
- Is 227 a Prime Number? - Yes
- Is 120 a Prime Number? - No

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