It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 212 216 is not a prime number.
For example, 212 216 can be divided by 2: 212 216 / 2 = 106 108.
For 212 216 to be a prime number, it would have been required that 212 216 has only two divisors, i.e., itself and 1.
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212 216 is an even number, because it is evenly divisible by 2: 212 216 / 2 = 106 108.
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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 212 216 is about 460.669.
Thus, the square root of 212 216 is not an integer, and therefore 212 216 is not a square number.
The square of a number (here 212 216) is the result of the product of this number (212 216) by itself (i.e., 212 216 × 212 216); the square of 212 216 is sometimes called "raising 212 216 to the power 2", or "212 216 squared".
The square of 212 216 is 45 035 630 656 because 212 216 × 212 216 = 212 2162 = 45 035 630 656.
As a consequence, 212 216 is the square root of 45 035 630 656.
The multiples of 212 216 are all integers evenly divisible by 212 216, that is all numbers such that the remainder of the division by 212 216 is zero. There are infinitely many multiples of 212 216. The smallest multiples of 212 216 are: