It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 513 298 is not a prime number.
For example, 513 298 can be divided by 2: 513 298 / 2 = 256 649.
For 513 298 to be a prime number, it would have been required that 513 298 has only two divisors, i.e., itself and 1.
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513 298 is an even number, because it is evenly divisible by 2: 513 298 / 2 = 256 649.
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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 513 298 is about 716.448.
Thus, the square root of 513 298 is not an integer, and therefore 513 298 is not a square number.
The square of a number (here 513 298) is the result of the product of this number (513 298) by itself (i.e., 513 298 × 513 298); the square of 513 298 is sometimes called "raising 513 298 to the power 2", or "513 298 squared".
The square of 513 298 is 263 474 836 804 because 513 298 × 513 298 = 513 2982 = 263 474 836 804.
As a consequence, 513 298 is the square root of 263 474 836 804.
The multiples of 513 298 are all integers evenly divisible by 513 298, that is all numbers such that the remainder of the division by 513 298 is zero. There are infinitely many multiples of 513 298. The smallest multiples of 513 298 are: