It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 511 428 is not a prime number.
For example, 511 428 can be divided by 2: 511 428 / 2 = 255 714.
For 511 428 to be a prime number, it would have been required that 511 428 has only two divisors, i.e., itself and 1.
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511 428 is an even number, because it is evenly divisible by 2: 511 428 / 2 = 255 714.
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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 511 428 is about 715.142.
Thus, the square root of 511 428 is not an integer, and therefore 511 428 is not a square number.
The square of a number (here 511 428) is the result of the product of this number (511 428) by itself (i.e., 511 428 × 511 428); the square of 511 428 is sometimes called "raising 511 428 to the power 2", or "511 428 squared".
The square of 511 428 is 261 558 599 184 because 511 428 × 511 428 = 511 4282 = 261 558 599 184.
As a consequence, 511 428 is the square root of 261 558 599 184.
The multiples of 511 428 are all integers evenly divisible by 511 428, that is all numbers such that the remainder of the division by 511 428 is zero. There are infinitely many multiples of 511 428. The smallest multiples of 511 428 are: