It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 331 998 is not a prime number.
For example, 331 998 can be divided by 2: 331 998 / 2 = 165 999.
For 331 998 to be a prime number, it would have been required that 331 998 has only two divisors, i.e., itself and 1.
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331 998 is an even number, because it is evenly divisible by 2: 331 998 / 2 = 165 999.
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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 331 998 is about 576.193.
Thus, the square root of 331 998 is not an integer, and therefore 331 998 is not a square number.
The square of a number (here 331 998) is the result of the product of this number (331 998) by itself (i.e., 331 998 × 331 998); the square of 331 998 is sometimes called "raising 331 998 to the power 2", or "331 998 squared".
The square of 331 998 is 110 222 672 004 because 331 998 × 331 998 = 331 9982 = 110 222 672 004.
As a consequence, 331 998 is the square root of 110 222 672 004.
The multiples of 331 998 are all integers evenly divisible by 331 998, that is all numbers such that the remainder of the division by 331 998 is zero. There are infinitely many multiples of 331 998. The smallest multiples of 331 998 are: