# Is 851 a Prime Number?

Is 851 a prime number? How do you know that 851 is prime or composite? Let us first understand what makes a number 'prime'. If a number has only 2 factors (1 and the number itself), then it is a prime number. If the number has more than 2 factors, then it is composite. Now, what do you think of 851? Is 851 a prime number? * "No, 851 is not a prime number."* Since 851 has more than 2 factors i.e. 1, 23, 37, 851, it is a composite number. Let's study this in detail.

**Is 851 a prime number? -**No**Is 851 a composite number? -**Yes**Is 851 a perfect square? -**No**Prime Factors of 851 -**23, 37**Factors of 851 -**1, 23, 37, 851

## Is 851 a Prime Number?

No, 851 is not a prime number. The number 851 is divisible by 1, 23, 37, 851. For a number to be classified as a prime number, it should have exactly two factors. Since 851 has more than two factors, i.e. 1, 23, 37, 851, it is not a prime number.

## Why is 851 not a Prime Number?

To understand whether 851 is composite or prime, it is important to find its factors.

**Factors of 851:** 1, 23, 37, 851

Since 851 has more than 2 factors, we can say that 851 is not a prime number.

## Is 851 a Composite Number?

Yes, since 851 has more than two factors i.e. 1, 23, 37, 851. In other words, 851 is a composite number because 851 has more than 2 factors.

**Problem Statements: **

Is 851 a Prime Number? | No |

Is 851 a Composite Number? | Yes |

Multiples of 851 | 851, 1702, 2553, 3404, 4255, 5106, 5957, 6808, 7659, 8510 |

Cube Root of 851 | 9.476374 |

Square of 851 | 724201 |

Is 851 an Even Number? | No |

Square Root of 851 | 29.171904 |

Is 851 an Odd Number? | Yes |

Is 851 a Perfect Cube? | No |

Is 851 a Perfect Square? | No |

**Fun Facts: **

- A perfect square (square number) is always a composite number.
- 5 is the only prime number having the last digit as 5.
- 23 is the smallest prime number having consecutive digits.

**☛ Also Check: **

- Is 64 a Prime Number? - No
- Is 59 a Prime Number? - Yes
- Is 5 a Prime Number? - Yes
- Is 93 a Prime Number? - No
- Is 133 a Prime Number? - No
- Is 227 a Prime Number? - Yes
- Is 2401 a Prime Number? - No
- Is 327 a Prime Number? - No