It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 210 216 is not a prime number.
For example, 210 216 can be divided by 2: 210 216 / 2 = 105 108.
For 210 216 to be a prime number, it would have been required that 210 216 has only two divisors, i.e., itself and 1.
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210 216 is an even number, because it is evenly divisible by 2: 210 216 / 2 = 105 108.
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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 210 216 is about 458.493.
Thus, the square root of 210 216 is not an integer, and therefore 210 216 is not a square number.
The square of a number (here 210 216) is the result of the product of this number (210 216) by itself (i.e., 210 216 × 210 216); the square of 210 216 is sometimes called "raising 210 216 to the power 2", or "210 216 squared".
The square of 210 216 is 44 190 766 656 because 210 216 × 210 216 = 210 2162 = 44 190 766 656.
As a consequence, 210 216 is the square root of 44 190 766 656.
The multiples of 210 216 are all integers evenly divisible by 210 216, that is all numbers such that the remainder of the division by 210 216 is zero. There are infinitely many multiples of 210 216. The smallest multiples of 210 216 are: