It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 165 171 is not a prime number.
For example, 165 171 can be divided by 3: 165 171 / 3 = 55 057.
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For 165 171 to be a prime number, it would have been required that 165 171 has only two divisors, i.e., itself and 1.
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165 171 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 165 171 is about 406.412.
Thus, the square root of 165 171 is not an integer, and therefore 165 171 is not a square number.
The square of a number (here 165 171) is the result of the product of this number (165 171) by itself (i.e., 165 171 × 165 171); the square of 165 171 is sometimes called "raising 165 171 to the power 2", or "165 171 squared".
The square of 165 171 is 27 281 459 241 because 165 171 × 165 171 = 165 1712 = 27 281 459 241.
As a consequence, 165 171 is the square root of 27 281 459 241.
The multiples of 165 171 are all integers evenly divisible by 165 171, that is all numbers such that the remainder of the division by 165 171 is zero. There are infinitely many multiples of 165 171. The smallest multiples of 165 171 are: