It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 490 226 is not a prime number.
For example, 490 226 can be divided by 2: 490 226 / 2 = 245 113.
For 490 226 to be a prime number, it would have been required that 490 226 has only two divisors, i.e., itself and 1.
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490 226 is an even number, because it is evenly divisible by 2: 490 226 / 2 = 245 113.
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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 490 226 is about 700.161.
Thus, the square root of 490 226 is not an integer, and therefore 490 226 is not a square number.
The square of a number (here 490 226) is the result of the product of this number (490 226) by itself (i.e., 490 226 × 490 226); the square of 490 226 is sometimes called "raising 490 226 to the power 2", or "490 226 squared".
The square of 490 226 is 240 321 531 076 because 490 226 × 490 226 = 490 2262 = 240 321 531 076.
As a consequence, 490 226 is the square root of 240 321 531 076.
The multiples of 490 226 are all integers evenly divisible by 490 226, that is all numbers such that the remainder of the division by 490 226 is zero. There are infinitely many multiples of 490 226. The smallest multiples of 490 226 are: