It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 558 478 is not a prime number.
For example, 558 478 can be divided by 2: 558 478 / 2 = 279 239.
For 558 478 to be a prime number, it would have been required that 558 478 has only two divisors, i.e., itself and 1.
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558 478 is an even number, because it is evenly divisible by 2: 558 478 / 2 = 279 239.
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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 558 478 is about 747.314.
Thus, the square root of 558 478 is not an integer, and therefore 558 478 is not a square number.
The square of a number (here 558 478) is the result of the product of this number (558 478) by itself (i.e., 558 478 × 558 478); the square of 558 478 is sometimes called "raising 558 478 to the power 2", or "558 478 squared".
The square of 558 478 is 311 897 676 484 because 558 478 × 558 478 = 558 4782 = 311 897 676 484.
As a consequence, 558 478 is the square root of 311 897 676 484.
The multiples of 558 478 are all integers evenly divisible by 558 478, that is all numbers such that the remainder of the division by 558 478 is zero. There are infinitely many multiples of 558 478. The smallest multiples of 558 478 are: