It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 267 243 is not a prime number.
For example, 267 243 can be divided by 3: 267 243 / 3 = 89 081.
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For 267 243 to be a prime number, it would have been required that 267 243 has only two divisors, i.e., itself and 1.
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267 243 is an odd number, because it is not evenly divisible by 2.
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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 267 243 is about 516.956.
Thus, the square root of 267 243 is not an integer, and therefore 267 243 is not a square number.
The square of a number (here 267 243) is the result of the product of this number (267 243) by itself (i.e., 267 243 × 267 243); the square of 267 243 is sometimes called "raising 267 243 to the power 2", or "267 243 squared".
The square of 267 243 is 71 418 821 049 because 267 243 × 267 243 = 267 2432 = 71 418 821 049.
As a consequence, 267 243 is the square root of 71 418 821 049.
The multiples of 267 243 are all integers evenly divisible by 267 243, that is all numbers such that the remainder of the division by 267 243 is zero. There are infinitely many multiples of 267 243. The smallest multiples of 267 243 are: