It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 165 363 is not a prime number.
For example, 165 363 can be divided by 3: 165 363 / 3 = 55 121.
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For 165 363 to be a prime number, it would have been required that 165 363 has only two divisors, i.e., itself and 1.
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165 363 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 165 363 is about 406.648.
Thus, the square root of 165 363 is not an integer, and therefore 165 363 is not a square number.
The square of a number (here 165 363) is the result of the product of this number (165 363) by itself (i.e., 165 363 × 165 363); the square of 165 363 is sometimes called "raising 165 363 to the power 2", or "165 363 squared".
The square of 165 363 is 27 344 921 769 because 165 363 × 165 363 = 165 3632 = 27 344 921 769.
As a consequence, 165 363 is the square root of 27 344 921 769.
The multiples of 165 363 are all integers evenly divisible by 165 363, that is all numbers such that the remainder of the division by 165 363 is zero. There are infinitely many multiples of 165 363. The smallest multiples of 165 363 are: