Number 543 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 543 as a prime number, because it can be written as a product of two smaller natural numbers (check the factors of number 543 below).

Number of factors: 4.

List of factors/divisors: 1, 3, 181, 543.

Parity: 543 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 185 (perfect number is a positive integer that is equal to the sum of its proper divisors).

Number: Prime number: | 536 no | 537 no | 538 no | 539 no | 540 no | 541 yes | 542 no | 543 no | 544 no | 545 no | 546 no | 547 yes | 548 no | 549 no | 550 no |
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