# Is 165 a Prime Number?

Is 165 a prime number? If a number has only two factors, i.e. 1 and the number itself, it is known as a prime number. In contrast, composite numbers have more than two factors. By this explanation, can we answer the question - is 165 a prime number? According to the definition mentioned above, we can say * "No, 165 is not a prime number."* Now let us take a look at the detailed solution of why is 165 a prime number or a composite number?

**Is 165 a prime number? -**No**Is 165 a composite number? -**Yes**Factors of 165 -**1, 3, 5, 11, 15, 33, 55, 165**Is 165 a perfect square? -**No**Prime Factors of 165 -**3, 5, 11

## Is 165 a Prime Number?

No, 165 is not a prime number. The number 165 is divisible by 1, 3, 5, 11, 15, 33, 55, 165. For a number to be classified as a prime number, it should have exactly two factors. Since 165 has more than two factors, i.e. 1, 3, 5, 11, 15, 33, 55, 165, it is not a prime number.

## Why is 165 not a Prime Number?

To understand whether 165 is prime or composite, it is important to find its factors.

**Factors of 165:** 1, 3, 5, 11, 15, 33, 55, 165

Since 165 has more than 2 factors, we can say that 165 is not a prime number.

## Is 165 a Composite Number?

Yes, since 165 has more than two factors i.e. 1, 3, 5, 11, 15, 33, 55, 165. In other words, 165 is a composite number because 165 has more than 2 factors.

**Problem Statements: **

Is 165 a Prime Number? | No |

Is 165 a Composite Number? | Yes |

Square of 165 | 27225 |

Is 165 an Even Number? | No |

Is 165 a Perfect Square? | No |

Is 165 a Perfect Cube? | No |

Multiples of 165 | 165, 330, 495, 660, 825, 990, 1155, 1320, 1485, 1650 |

Cube Root of 165 | 5.484797 |

Square Root of 165 | 12.845233 |

Is 165 an Odd Number? | Yes |

**Fun Facts: **

- 1 is neither prime nor composite.
- 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.
- Euler discovered a polynomial n
^{2}+ n + 41 that produces prime numbers for values of n that lie between 0 and 39 inclusive. It can generate 40 prime numbers for 0 <= n <= 39.

**☛ Also Check: **

- Is 221 a Prime Number? - No
- Is 81 a Prime Number? - No
- Is 18 a Prime Number? - No
- Is 27 a Prime Number? - No
- Is 9 a Prime Number? - No
- Is 197 a Prime Number? - Yes
- Is 481 a Prime Number? - No
- Is 937 a Prime Number? - Yes