It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 490 135 218 is not a prime number.
For example, 490 135 218 can be divided by 2: 490 135 218 / 2 = 245 067 609.
For 490 135 218 to be a prime number, it would have been required that 490 135 218 has only two divisors, i.e., itself and 1.
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490 135 218 is an even number, because it is evenly divisible by 2: 490 135 218 / 2 = 245 067 609.
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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 490 135 218 is about 22 138.998.
Thus, the square root of 490 135 218 is not an integer, and therefore 490 135 218 is not a square number.
The square of a number (here 490 135 218) is the result of the product of this number (490 135 218) by itself (i.e., 490 135 218 × 490 135 218); the square of 490 135 218 is sometimes called "raising 490 135 218 to the power 2", or "490 135 218 squared".
The square of 490 135 218 is 240 232 531 923 907 520 because 490 135 218 × 490 135 218 = 490 135 2182 = 240 232 531 923 907 520.
As a consequence, 490 135 218 is the square root of 240 232 531 923 907 520.
490 135 218 is a number with 9 digits.
The multiples of 490 135 218 are all integers evenly divisible by 490 135 218, that is all numbers such that the remainder of the division by 490 135 218 is zero. There are infinitely many multiples of 490 135 218. The smallest multiples of 490 135 218 are: