Number 431 is a prime number.

A prime number is a natural number greater than 1 that is not a product of two smaller natural numbers. Therefore we consider 431 as a prime number, because:

- 431 is a natural number greater than 1,
- 431 is not a product of 2 smaller natural numbers (it can be divided only by 1 and itself)

Number of factors: 2.

List of factors/divisors: 1, 431.

Parity: 431 is an odd number.

Perfect square: no (a square number or perfect square is an integer that is the square of an integer).

Perfect number: no, because the sum of its proper divisors is 1 (perfect number is a positive integer that is equal to the sum of its proper divisors).

Number: Prime number: | 424 no | 425 no | 426 no | 427 no | 428 no | 429 no | 430 no | 431 yes | 432 no | 433 yes | 434 no | 435 no | 436 no | 437 no | 438 no |
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