It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 267 218 is not a prime number.
For example, 267 218 can be divided by 2: 267 218 / 2 = 133 609.
For 267 218 to be a prime number, it would have been required that 267 218 has only two divisors, i.e., itself and 1.
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267 218 is an even number, because it is evenly divisible by 2: 267 218 / 2 = 133 609.
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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 267 218 is about 516.931.
Thus, the square root of 267 218 is not an integer, and therefore 267 218 is not a square number.
The square of a number (here 267 218) is the result of the product of this number (267 218) by itself (i.e., 267 218 × 267 218); the square of 267 218 is sometimes called "raising 267 218 to the power 2", or "267 218 squared".
The square of 267 218 is 71 405 459 524 because 267 218 × 267 218 = 267 2182 = 71 405 459 524.
As a consequence, 267 218 is the square root of 71 405 459 524.
The multiples of 267 218 are all integers evenly divisible by 267 218, that is all numbers such that the remainder of the division by 267 218 is zero. There are infinitely many multiples of 267 218. The smallest multiples of 267 218 are: