It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 513 424 994 is not a prime number.
For example, 513 424 994 can be divided by 2: 513 424 994 / 2 = 256 712 497.
For 513 424 994 to be a prime number, it would have been required that 513 424 994 has only two divisors, i.e., itself and 1.
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513 424 994 is an even number, because it is evenly divisible by 2: 513 424 994 / 2 = 256 712 497.
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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 513 424 994 is about 22 658.883.
Thus, the square root of 513 424 994 is not an integer, and therefore 513 424 994 is not a square number.
The square of a number (here 513 424 994) is the result of the product of this number (513 424 994) by itself (i.e., 513 424 994 × 513 424 994); the square of 513 424 994 is sometimes called "raising 513 424 994 to the power 2", or "513 424 994 squared".
The square of 513 424 994 is 263 605 224 463 900 032 because 513 424 994 × 513 424 994 = 513 424 9942 = 263 605 224 463 900 032.
As a consequence, 513 424 994 is the square root of 263 605 224 463 900 032.
513 424 994 is a number with 9 digits.
The multiples of 513 424 994 are all integers evenly divisible by 513 424 994, that is all numbers such that the remainder of the division by 513 424 994 is zero. There are infinitely many multiples of 513 424 994. The smallest multiples of 513 424 994 are: