It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 298 216 is not a prime number.
For example, 298 216 can be divided by 2: 298 216 / 2 = 149 108.
For 298 216 to be a prime number, it would have been required that 298 216 has only two divisors, i.e., itself and 1.
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298 216 is an even number, because it is evenly divisible by 2: 298 216 / 2 = 149 108.
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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 298 216 is about 546.092.
Thus, the square root of 298 216 is not an integer, and therefore 298 216 is not a square number.
The square of a number (here 298 216) is the result of the product of this number (298 216) by itself (i.e., 298 216 × 298 216); the square of 298 216 is sometimes called "raising 298 216 to the power 2", or "298 216 squared".
The square of 298 216 is 88 932 782 656 because 298 216 × 298 216 = 298 2162 = 88 932 782 656.
As a consequence, 298 216 is the square root of 88 932 782 656.
The multiples of 298 216 are all integers evenly divisible by 298 216, that is all numbers such that the remainder of the division by 298 216 is zero. There are infinitely many multiples of 298 216. The smallest multiples of 298 216 are: