It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 502 016 is not a prime number.
For example, 502 016 can be divided by 2: 502 016 / 2 = 251 008.
For 502 016 to be a prime number, it would have been required that 502 016 has only two divisors, i.e., itself and 1.
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502 016 is an even number, because it is evenly divisible by 2: 502 016 / 2 = 251 008.
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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 502 016 is about 708.531.
Thus, the square root of 502 016 is not an integer, and therefore 502 016 is not a square number.
The square of a number (here 502 016) is the result of the product of this number (502 016) by itself (i.e., 502 016 × 502 016); the square of 502 016 is sometimes called "raising 502 016 to the power 2", or "502 016 squared".
The square of 502 016 is 252 020 064 256 because 502 016 × 502 016 = 502 0162 = 252 020 064 256.
As a consequence, 502 016 is the square root of 252 020 064 256.
The multiples of 502 016 are all integers evenly divisible by 502 016, that is all numbers such that the remainder of the division by 502 016 is zero. There are infinitely many multiples of 502 016. The smallest multiples of 502 016 are: