It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 267 318 is not a prime number.
For example, 267 318 can be divided by 2: 267 318 / 2 = 133 659.
For 267 318 to be a prime number, it would have been required that 267 318 has only two divisors, i.e., itself and 1.
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267 318 is an even number, because it is evenly divisible by 2: 267 318 / 2 = 133 659.
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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 267 318 is about 517.028.
Thus, the square root of 267 318 is not an integer, and therefore 267 318 is not a square number.
The square of a number (here 267 318) is the result of the product of this number (267 318) by itself (i.e., 267 318 × 267 318); the square of 267 318 is sometimes called "raising 267 318 to the power 2", or "267 318 squared".
The square of 267 318 is 71 458 913 124 because 267 318 × 267 318 = 267 3182 = 71 458 913 124.
As a consequence, 267 318 is the square root of 71 458 913 124.
The multiples of 267 318 are all integers evenly divisible by 267 318, that is all numbers such that the remainder of the division by 267 318 is zero. There are infinitely many multiples of 267 318. The smallest multiples of 267 318 are: