It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 496 518 is not a prime number.
For example, 496 518 can be divided by 2: 496 518 / 2 = 248 259.
For 496 518 to be a prime number, it would have been required that 496 518 has only two divisors, i.e., itself and 1.
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496 518 is an even number, because it is evenly divisible by 2: 496 518 / 2 = 248 259.
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A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 496 518 is about 704.640.
Thus, the square root of 496 518 is not an integer, and therefore 496 518 is not a square number.
The square of a number (here 496 518) is the result of the product of this number (496 518) by itself (i.e., 496 518 × 496 518); the square of 496 518 is sometimes called "raising 496 518 to the power 2", or "496 518 squared".
The square of 496 518 is 246 530 124 324 because 496 518 × 496 518 = 496 5182 = 246 530 124 324.
As a consequence, 496 518 is the square root of 246 530 124 324.
The multiples of 496 518 are all integers evenly divisible by 496 518, that is all numbers such that the remainder of the division by 496 518 is zero. There are infinitely many multiples of 496 518. The smallest multiples of 496 518 are: