It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 513 722 is not a prime number.
For example, 513 722 can be divided by 2: 513 722 / 2 = 256 861.
For 513 722 to be a prime number, it would have been required that 513 722 has only two divisors, i.e., itself and 1.
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513 722 is an even number, because it is evenly divisible by 2: 513 722 / 2 = 256 861.
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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 513 722 is about 716.744.
Thus, the square root of 513 722 is not an integer, and therefore 513 722 is not a square number.
The square of a number (here 513 722) is the result of the product of this number (513 722) by itself (i.e., 513 722 × 513 722); the square of 513 722 is sometimes called "raising 513 722 to the power 2", or "513 722 squared".
The square of 513 722 is 263 910 293 284 because 513 722 × 513 722 = 513 7222 = 263 910 293 284.
As a consequence, 513 722 is the square root of 263 910 293 284.
The multiples of 513 722 are all integers evenly divisible by 513 722, that is all numbers such that the remainder of the division by 513 722 is zero. There are infinitely many multiples of 513 722. The smallest multiples of 513 722 are: