It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 511 339 016 is not a prime number.
For example, 511 339 016 can be divided by 2: 511 339 016 / 2 = 255 669 508.
For 511 339 016 to be a prime number, it would have been required that 511 339 016 has only two divisors, i.e., itself and 1.
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511 339 016 is an even number, because it is evenly divisible by 2: 511 339 016 / 2 = 255 669 508.
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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 511 339 016 is about 22 612.806.
Thus, the square root of 511 339 016 is not an integer, and therefore 511 339 016 is not a square number.
The square of a number (here 511 339 016) is the result of the product of this number (511 339 016) by itself (i.e., 511 339 016 × 511 339 016); the square of 511 339 016 is sometimes called "raising 511 339 016 to the power 2", or "511 339 016 squared".
The square of 511 339 016 is 261 467 589 283 848 256 because 511 339 016 × 511 339 016 = 511 339 0162 = 261 467 589 283 848 256.
As a consequence, 511 339 016 is the square root of 261 467 589 283 848 256.
511 339 016 is a number with 9 digits.
The multiples of 511 339 016 are all integers evenly divisible by 511 339 016, that is all numbers such that the remainder of the division by 511 339 016 is zero. There are infinitely many multiples of 511 339 016. The smallest multiples of 511 339 016 are: