It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 513 118 is not a prime number.
For example, 513 118 can be divided by 2: 513 118 / 2 = 256 559.
For 513 118 to be a prime number, it would have been required that 513 118 has only two divisors, i.e., itself and 1.
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513 118 is an even number, because it is evenly divisible by 2: 513 118 / 2 = 256 559.
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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 513 118 is about 716.323.
Thus, the square root of 513 118 is not an integer, and therefore 513 118 is not a square number.
The square of a number (here 513 118) is the result of the product of this number (513 118) by itself (i.e., 513 118 × 513 118); the square of 513 118 is sometimes called "raising 513 118 to the power 2", or "513 118 squared".
The square of 513 118 is 263 290 081 924 because 513 118 × 513 118 = 513 1182 = 263 290 081 924.
As a consequence, 513 118 is the square root of 263 290 081 924.
The multiples of 513 118 are all integers evenly divisible by 513 118, that is all numbers such that the remainder of the division by 513 118 is zero. There are infinitely many multiples of 513 118. The smallest multiples of 513 118 are: