Number 581 is not a prime number. It is a composite number.

A prime number is a natural number greater than 1 that is not a product of two smaller natural numbers. We do not consider 581 as a prime number, because it can be written as a product of two smaller natural numbers (check the factors of number 581 below).

Number of factors: 4.

List of factors/divisors: 1, 7, 83, 581.

Parity: 581 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 91 (perfect number is a positive integer that is equal to the sum of its proper divisors).

Number: Prime number: | 574 no | 575 no | 576 no | 577 yes | 578 no | 579 no | 580 no | 581 no | 582 no | 583 no | 584 no | 585 no | 586 no | 587 yes | 588 no |
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