It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 165 201 is not a prime number.
For example, 165 201 can be divided by 3: 165 201 / 3 = 55 067.
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For 165 201 to be a prime number, it would have been required that 165 201 has only two divisors, i.e., itself and 1.
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165 201 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 165 201 is about 406.449.
Thus, the square root of 165 201 is not an integer, and therefore 165 201 is not a square number.
The square of a number (here 165 201) is the result of the product of this number (165 201) by itself (i.e., 165 201 × 165 201); the square of 165 201 is sometimes called "raising 165 201 to the power 2", or "165 201 squared".
The square of 165 201 is 27 291 370 401 because 165 201 × 165 201 = 165 2012 = 27 291 370 401.
As a consequence, 165 201 is the square root of 27 291 370 401.
The multiples of 165 201 are all integers evenly divisible by 165 201, that is all numbers such that the remainder of the division by 165 201 is zero. There are infinitely many multiples of 165 201. The smallest multiples of 165 201 are: