It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 201 243 is not a prime number.
For example, 201 243 can be divided by 3: 201 243 / 3 = 67 081.
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For 201 243 to be a prime number, it would have been required that 201 243 has only two divisors, i.e., itself and 1.
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201 243 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 201 243 is about 448.601.
Thus, the square root of 201 243 is not an integer, and therefore 201 243 is not a square number.
The square of a number (here 201 243) is the result of the product of this number (201 243) by itself (i.e., 201 243 × 201 243); the square of 201 243 is sometimes called "raising 201 243 to the power 2", or "201 243 squared".
The square of 201 243 is 40 498 745 049 because 201 243 × 201 243 = 201 2432 = 40 498 745 049.
As a consequence, 201 243 is the square root of 40 498 745 049.
The multiples of 201 243 are all integers evenly divisible by 201 243, that is all numbers such that the remainder of the division by 201 243 is zero. There are infinitely many multiples of 201 243. The smallest multiples of 201 243 are: