It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 200 243 is not a prime number.
For example, 200 243 can be divided by 17: 200 243 / 17 = 11 779.
For 200 243 to be a prime number, it would have been required that 200 243 has only two divisors, i.e., itself and 1.
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200 243 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 200 243 is about 447.485.
Thus, the square root of 200 243 is not an integer, and therefore 200 243 is not a square number.
The square of a number (here 200 243) is the result of the product of this number (200 243) by itself (i.e., 200 243 × 200 243); the square of 200 243 is sometimes called "raising 200 243 to the power 2", or "200 243 squared".
The square of 200 243 is 40 097 259 049 because 200 243 × 200 243 = 200 2432 = 40 097 259 049.
As a consequence, 200 243 is the square root of 40 097 259 049.
The multiples of 200 243 are all integers evenly divisible by 200 243, that is all numbers such that the remainder of the division by 200 243 is zero. There are infinitely many multiples of 200 243. The smallest multiples of 200 243 are: