It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 165 585 423 is not a prime number.
For example, 165 585 423 can be divided by 3: 165 585 423 / 3 = 55 195 141.
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For 165 585 423 to be a prime number, it would have been required that 165 585 423 has only two divisors, i.e., itself and 1.
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165 585 423 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 165 585 423 is about 12 868.000.
Thus, the square root of 165 585 423 is not an integer, and therefore 165 585 423 is not a square number.
The square of a number (here 165 585 423) is the result of the product of this number (165 585 423) by itself (i.e., 165 585 423 × 165 585 423); the square of 165 585 423 is sometimes called "raising 165 585 423 to the power 2", or "165 585 423 squared".
The square of 165 585 423 is 27 418 532 310 088 928 because 165 585 423 × 165 585 423 = 165 585 4232 = 27 418 532 310 088 928.
As a consequence, 165 585 423 is the square root of 27 418 532 310 088 928.
165 585 423 is a number with 9 digits.
The multiples of 165 585 423 are all integers evenly divisible by 165 585 423, that is all numbers such that the remainder of the division by 165 585 423 is zero. There are infinitely many multiples of 165 585 423. The smallest multiples of 165 585 423 are: