It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 513 636 is not a prime number.
For example, 513 636 can be divided by 2: 513 636 / 2 = 256 818.
For 513 636 to be a prime number, it would have been required that 513 636 has only two divisors, i.e., itself and 1.
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513 636 is an even number, because it is evenly divisible by 2: 513 636 / 2 = 256 818.
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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 513 636 is about 716.684.
Thus, the square root of 513 636 is not an integer, and therefore 513 636 is not a square number.
The square of a number (here 513 636) is the result of the product of this number (513 636) by itself (i.e., 513 636 × 513 636); the square of 513 636 is sometimes called "raising 513 636 to the power 2", or "513 636 squared".
The square of 513 636 is 263 821 940 496 because 513 636 × 513 636 = 513 6362 = 263 821 940 496.
As a consequence, 513 636 is the square root of 263 821 940 496.
The multiples of 513 636 are all integers evenly divisible by 513 636, that is all numbers such that the remainder of the division by 513 636 is zero. There are infinitely many multiples of 513 636. The smallest multiples of 513 636 are: