It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 513 609 428 is not a prime number.
For example, 513 609 428 can be divided by 2: 513 609 428 / 2 = 256 804 714.
For 513 609 428 to be a prime number, it would have been required that 513 609 428 has only two divisors, i.e., itself and 1.
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513 609 428 is an even number, because it is evenly divisible by 2: 513 609 428 / 2 = 256 804 714.
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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 513 609 428 is about 22 662.953.
Thus, the square root of 513 609 428 is not an integer, and therefore 513 609 428 is not a square number.
The square of a number (here 513 609 428) is the result of the product of this number (513 609 428) by itself (i.e., 513 609 428 × 513 609 428); the square of 513 609 428 is sometimes called "raising 513 609 428 to the power 2", or "513 609 428 squared".
The square of 513 609 428 is 263 794 644 530 487 168 because 513 609 428 × 513 609 428 = 513 609 4282 = 263 794 644 530 487 168.
As a consequence, 513 609 428 is the square root of 263 794 644 530 487 168.
513 609 428 is a number with 9 digits.
The multiples of 513 609 428 are all integers evenly divisible by 513 609 428, that is all numbers such that the remainder of the division by 513 609 428 is zero. There are infinitely many multiples of 513 609 428. The smallest multiples of 513 609 428 are: