It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 513 018 is not a prime number.
For example, 513 018 can be divided by 2: 513 018 / 2 = 256 509.
For 513 018 to be a prime number, it would have been required that 513 018 has only two divisors, i.e., itself and 1.
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513 018 is an even number, because it is evenly divisible by 2: 513 018 / 2 = 256 509.
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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 513 018 is about 716.253.
Thus, the square root of 513 018 is not an integer, and therefore 513 018 is not a square number.
The square of a number (here 513 018) is the result of the product of this number (513 018) by itself (i.e., 513 018 × 513 018); the square of 513 018 is sometimes called "raising 513 018 to the power 2", or "513 018 squared".
The square of 513 018 is 263 187 468 324 because 513 018 × 513 018 = 513 0182 = 263 187 468 324.
As a consequence, 513 018 is the square root of 263 187 468 324.
The multiples of 513 018 are all integers evenly divisible by 513 018, that is all numbers such that the remainder of the division by 513 018 is zero. There are infinitely many multiples of 513 018. The smallest multiples of 513 018 are: