It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 198 131 is not a prime number.
For example, 198 131 can be divided by 239: 198 131 / 239 = 829.
For 198 131 to be a prime number, it would have been required that 198 131 has only two divisors, i.e., itself and 1.
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198 131 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 198 131 is about 445.119.
Thus, the square root of 198 131 is not an integer, and therefore 198 131 is not a square number.
The square of a number (here 198 131) is the result of the product of this number (198 131) by itself (i.e., 198 131 × 198 131); the square of 198 131 is sometimes called "raising 198 131 to the power 2", or "198 131 squared".
The square of 198 131 is 39 255 893 161 because 198 131 × 198 131 = 198 1312 = 39 255 893 161.
As a consequence, 198 131 is the square root of 39 255 893 161.
The multiples of 198 131 are all integers evenly divisible by 198 131, that is all numbers such that the remainder of the division by 198 131 is zero. There are infinitely many multiples of 198 131. The smallest multiples of 198 131 are: