It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 320 502 is not a prime number.
For example, 320 502 can be divided by 2: 320 502 / 2 = 160 251.
For 320 502 to be a prime number, it would have been required that 320 502 has only two divisors, i.e., itself and 1.
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320 502 is an even number, because it is evenly divisible by 2: 320 502 / 2 = 160 251.
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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 320 502 is about 566.129.
Thus, the square root of 320 502 is not an integer, and therefore 320 502 is not a square number.
The square of a number (here 320 502) is the result of the product of this number (320 502) by itself (i.e., 320 502 × 320 502); the square of 320 502 is sometimes called "raising 320 502 to the power 2", or "320 502 squared".
The square of 320 502 is 102 721 532 004 because 320 502 × 320 502 = 320 5022 = 102 721 532 004.
As a consequence, 320 502 is the square root of 102 721 532 004.
The multiples of 320 502 are all integers evenly divisible by 320 502, that is all numbers such that the remainder of the division by 320 502 is zero. There are infinitely many multiples of 320 502. The smallest multiples of 320 502 are: