It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 165 204 is not a prime number.
For example, 165 204 can be divided by 2: 165 204 / 2 = 82 602.
For 165 204 to be a prime number, it would have been required that 165 204 has only two divisors, i.e., itself and 1.
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165 204 is an even number, because it is evenly divisible by 2: 165 204 / 2 = 82 602.
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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 165 204 is about 406.453.
Thus, the square root of 165 204 is not an integer, and therefore 165 204 is not a square number.
The square of a number (here 165 204) is the result of the product of this number (165 204) by itself (i.e., 165 204 × 165 204); the square of 165 204 is sometimes called "raising 165 204 to the power 2", or "165 204 squared".
The square of 165 204 is 27 292 361 616 because 165 204 × 165 204 = 165 2042 = 27 292 361 616.
As a consequence, 165 204 is the square root of 27 292 361 616.
The multiples of 165 204 are all integers evenly divisible by 165 204, that is all numbers such that the remainder of the division by 165 204 is zero. There are infinitely many multiples of 165 204. The smallest multiples of 165 204 are: