It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 509 856 208 is not a prime number.
For example, 509 856 208 can be divided by 2: 509 856 208 / 2 = 254 928 104.
For 509 856 208 to be a prime number, it would have been required that 509 856 208 has only two divisors, i.e., itself and 1.
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509 856 208 is an even number, because it is evenly divisible by 2: 509 856 208 / 2 = 254 928 104.
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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 509 856 208 is about 22 579.996.
Thus, the square root of 509 856 208 is not an integer, and therefore 509 856 208 is not a square number.
The square of a number (here 509 856 208) is the result of the product of this number (509 856 208) by itself (i.e., 509 856 208 × 509 856 208); the square of 509 856 208 is sometimes called "raising 509 856 208 to the power 2", or "509 856 208 squared".
The square of 509 856 208 is 259 953 352 836 139 264 because 509 856 208 × 509 856 208 = 509 856 2082 = 259 953 352 836 139 264.
As a consequence, 509 856 208 is the square root of 259 953 352 836 139 264.
509 856 208 is a number with 9 digits.
The multiples of 509 856 208 are all integers evenly divisible by 509 856 208, that is all numbers such that the remainder of the division by 509 856 208 is zero. There are infinitely many multiples of 509 856 208. The smallest multiples of 509 856 208 are: