It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 165 371 is not a prime number.
For example, 165 371 can be divided by 61: 165 371 / 61 = 2 711.
For 165 371 to be a prime number, it would have been required that 165 371 has only two divisors, i.e., itself and 1.
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165 371 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 165 371 is about 406.658.
Thus, the square root of 165 371 is not an integer, and therefore 165 371 is not a square number.
The square of a number (here 165 371) is the result of the product of this number (165 371) by itself (i.e., 165 371 × 165 371); the square of 165 371 is sometimes called "raising 165 371 to the power 2", or "165 371 squared".
The square of 165 371 is 27 347 567 641 because 165 371 × 165 371 = 165 3712 = 27 347 567 641.
As a consequence, 165 371 is the square root of 27 347 567 641.
The multiples of 165 371 are all integers evenly divisible by 165 371, that is all numbers such that the remainder of the division by 165 371 is zero. There are infinitely many multiples of 165 371. The smallest multiples of 165 371 are: