It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 505 522 is not a prime number.
For example, 505 522 can be divided by 2: 505 522 / 2 = 252 761.
For 505 522 to be a prime number, it would have been required that 505 522 has only two divisors, i.e., itself and 1.
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505 522 is an even number, because it is evenly divisible by 2: 505 522 / 2 = 252 761.
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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 505 522 is about 711.001.
Thus, the square root of 505 522 is not an integer, and therefore 505 522 is not a square number.
The square of a number (here 505 522) is the result of the product of this number (505 522) by itself (i.e., 505 522 × 505 522); the square of 505 522 is sometimes called "raising 505 522 to the power 2", or "505 522 squared".
The square of 505 522 is 255 552 492 484 because 505 522 × 505 522 = 505 5222 = 255 552 492 484.
As a consequence, 505 522 is the square root of 255 552 492 484.
The multiples of 505 522 are all integers evenly divisible by 505 522, that is all numbers such that the remainder of the division by 505 522 is zero. There are infinitely many multiples of 505 522. The smallest multiples of 505 522 are: