It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 520 163 is not a prime number.
For example, 520 163 can be divided by 7: 520 163 / 7 = 74 309.
For 520 163 to be a prime number, it would have been required that 520 163 has only two divisors, i.e., itself and 1.
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520 163 is an odd number, because it is not evenly divisible by 2.
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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 520 163 is about 721.223.
Thus, the square root of 520 163 is not an integer, and therefore 520 163 is not a square number.
The square of a number (here 520 163) is the result of the product of this number (520 163) by itself (i.e., 520 163 × 520 163); the square of 520 163 is sometimes called "raising 520 163 to the power 2", or "520 163 squared".
The square of 520 163 is 270 569 546 569 because 520 163 × 520 163 = 520 1632 = 270 569 546 569.
As a consequence, 520 163 is the square root of 270 569 546 569.
The multiples of 520 163 are all integers evenly divisible by 520 163, that is all numbers such that the remainder of the division by 520 163 is zero. There are infinitely many multiples of 520 163. The smallest multiples of 520 163 are: