It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 491 031 is not a prime number.
For example, 491 031 can be divided by 3: 491 031 / 3 = 163 677.
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For 491 031 to be a prime number, it would have been required that 491 031 has only two divisors, i.e., itself and 1.
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491 031 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 491 031 is about 700.736.
Thus, the square root of 491 031 is not an integer, and therefore 491 031 is not a square number.
The square of a number (here 491 031) is the result of the product of this number (491 031) by itself (i.e., 491 031 × 491 031); the square of 491 031 is sometimes called "raising 491 031 to the power 2", or "491 031 squared".
The square of 491 031 is 241 111 442 961 because 491 031 × 491 031 = 491 0312 = 241 111 442 961.
As a consequence, 491 031 is the square root of 241 111 442 961.
The multiples of 491 031 are all integers evenly divisible by 491 031, that is all numbers such that the remainder of the division by 491 031 is zero. There are infinitely many multiples of 491 031. The smallest multiples of 491 031 are: