It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 216 242 is not a prime number.
For example, 216 242 can be divided by 2: 216 242 / 2 = 108 121.
For 216 242 to be a prime number, it would have been required that 216 242 has only two divisors, i.e., itself and 1.
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216 242 is an even number, because it is evenly divisible by 2: 216 242 / 2 = 108 121.
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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 216 242 is about 465.018.
Thus, the square root of 216 242 is not an integer, and therefore 216 242 is not a square number.
The square of a number (here 216 242) is the result of the product of this number (216 242) by itself (i.e., 216 242 × 216 242); the square of 216 242 is sometimes called "raising 216 242 to the power 2", or "216 242 squared".
The square of 216 242 is 46 760 602 564 because 216 242 × 216 242 = 216 2422 = 46 760 602 564.
As a consequence, 216 242 is the square root of 46 760 602 564.
The multiples of 216 242 are all integers evenly divisible by 216 242, that is all numbers such that the remainder of the division by 216 242 is zero. There are infinitely many multiples of 216 242. The smallest multiples of 216 242 are: