It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 240 343 is not a prime number.
For example, 240 343 can be divided by 31: 240 343 / 31 = 7 753.
For 240 343 to be a prime number, it would have been required that 240 343 has only two divisors, i.e., itself and 1.
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240 343 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 240 343 is about 490.248.
Thus, the square root of 240 343 is not an integer, and therefore 240 343 is not a square number.
The square of a number (here 240 343) is the result of the product of this number (240 343) by itself (i.e., 240 343 × 240 343); the square of 240 343 is sometimes called "raising 240 343 to the power 2", or "240 343 squared".
The square of 240 343 is 57 764 757 649 because 240 343 × 240 343 = 240 3432 = 57 764 757 649.
As a consequence, 240 343 is the square root of 57 764 757 649.
The multiples of 240 343 are all integers evenly divisible by 240 343, that is all numbers such that the remainder of the division by 240 343 is zero. There are infinitely many multiples of 240 343. The smallest multiples of 240 343 are: