It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 5 538 413 is not a prime number.
For example, 5 538 413 can be divided by 17: 5 538 413 / 17 = 325 789.
For 5 538 413 to be a prime number, it would have been required that 5 538 413 has only two divisors, i.e., itself and 1.
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5 538 413 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 5 538 413 is about 2 353.383.
Thus, the square root of 5 538 413 is not an integer, and therefore 5 538 413 is not a square number.
The square of a number (here 5 538 413) is the result of the product of this number (5 538 413) by itself (i.e., 5 538 413 × 5 538 413); the square of 5 538 413 is sometimes called "raising 5 538 413 to the power 2", or "5 538 413 squared".
The square of 5 538 413 is 30 674 018 558 569 because 5 538 413 × 5 538 413 = 5 538 4132 = 30 674 018 558 569.
As a consequence, 5 538 413 is the square root of 30 674 018 558 569.
The multiples of 5 538 413 are all integers evenly divisible by 5 538 413, that is all numbers such that the remainder of the division by 5 538 413 is zero. There are infinitely many multiples of 5 538 413. The smallest multiples of 5 538 413 are: