# Is 55 a Prime Number?

Is 55 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 55 is a prime or composite is - * "55 is a composite number."* Now, let us find out how and why is 55 a prime number or a composite number?

**Is 55 a prime number? -**No**Is 55 a composite number? -**Yes**Factors of 55 -**1, 5, 11, 55**Prime Factors of 55 -**5, 11**Is 55 a perfect square? -**No

## Is 55 a Prime Number?

No, 55 is not a prime number. The number 55 is divisible by 1, 5, 11, 55. For a number to be classified as a prime number, it should have exactly two factors. Since 55 has more than two factors, i.e. 1, 5, 11, 55, it is not a prime number.

## Why is 55 not a Prime Number?

To understand whether 55 is composite or prime, it is important to find its factors.

**Factors of 55:** 1, 5, 11, 55

Since 55 has more than 2 factors, we can say that 55 is not a prime number.

## Is 55 a Composite Number?

Yes, since 55 has more than two factors i.e. 1, 5, 11, 55. In other words, 55 is a composite number because 55 has more than 2 factors.

**Problem Statements: **

Is 55 a Prime Number? | No |

Is 55 a Composite Number? | Yes |

Is 55 a Perfect Square? | No |

Square of 55 | 3025 |

Is 55 an Odd Number? | Yes |

Multiples of 55 | 55, 110, 165, 220, 275, 330, 385, 440, 495, 550 |

Is 55 a Perfect Cube? | No |

Cube Root of 55 | 3.802947 |

Square Root of 55 | 7.416198 |

Is 55 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 - 10601, 11311, 12421
- A semiprime number is a composite number that is the product of exactly two prime numbers. Example - 115 is semiprime, since 115 can be written as 5 × 23.
- A perfect square (square number) is always a composite number.

**☛ Also Check: **

- Is 123 a Prime Number? - No
- Is 91 a Prime Number? - No
- Is 11 a Prime Number? - Yes
- Is 1 a Prime Number? - No
- Is 93 a Prime Number? - No
- Is 203 a Prime Number? - No
- Is 347 a Prime Number? - Yes
- Is 461 a Prime Number? - Yes

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