It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 513 409 018 is not a prime number.
For example, 513 409 018 can be divided by 2: 513 409 018 / 2 = 256 704 509.
For 513 409 018 to be a prime number, it would have been required that 513 409 018 has only two divisors, i.e., itself and 1.
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513 409 018 is an even number, because it is evenly divisible by 2: 513 409 018 / 2 = 256 704 509.
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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 513 409 018 is about 22 658.531.
Thus, the square root of 513 409 018 is not an integer, and therefore 513 409 018 is not a square number.
The square of a number (here 513 409 018) is the result of the product of this number (513 409 018) by itself (i.e., 513 409 018 × 513 409 018); the square of 513 409 018 is sometimes called "raising 513 409 018 to the power 2", or "513 409 018 squared".
The square of 513 409 018 is 263 588 819 763 724 320 because 513 409 018 × 513 409 018 = 513 409 0182 = 263 588 819 763 724 320.
As a consequence, 513 409 018 is the square root of 263 588 819 763 724 320.
513 409 018 is a number with 9 digits.
The multiples of 513 409 018 are all integers evenly divisible by 513 409 018, that is all numbers such that the remainder of the division by 513 409 018 is zero. There are infinitely many multiples of 513 409 018. The smallest multiples of 513 409 018 are: