It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 240 273 is not a prime number.
For example, 240 273 can be divided by 3: 240 273 / 3 = 80 091.
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For 240 273 to be a prime number, it would have been required that 240 273 has only two divisors, i.e., itself and 1.
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240 273 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 240 273 is about 490.176.
Thus, the square root of 240 273 is not an integer, and therefore 240 273 is not a square number.
The square of a number (here 240 273) is the result of the product of this number (240 273) by itself (i.e., 240 273 × 240 273); the square of 240 273 is sometimes called "raising 240 273 to the power 2", or "240 273 squared".
The square of 240 273 is 57 731 114 529 because 240 273 × 240 273 = 240 2732 = 57 731 114 529.
As a consequence, 240 273 is the square root of 57 731 114 529.
The multiples of 240 273 are all integers evenly divisible by 240 273, that is all numbers such that the remainder of the division by 240 273 is zero. There are infinitely many multiples of 240 273. The smallest multiples of 240 273 are: