It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 264 191 is not a prime number.
For example, 264 191 can be divided by 61: 264 191 / 61 = 4 331.
For 264 191 to be a prime number, it would have been required that 264 191 has only two divisors, i.e., itself and 1.
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264 191 is an odd number, because it is not evenly divisible by 2.
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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 264 191 is about 513.995.
Thus, the square root of 264 191 is not an integer, and therefore 264 191 is not a square number.
The square of a number (here 264 191) is the result of the product of this number (264 191) by itself (i.e., 264 191 × 264 191); the square of 264 191 is sometimes called "raising 264 191 to the power 2", or "264 191 squared".
The square of 264 191 is 69 796 884 481 because 264 191 × 264 191 = 264 1912 = 69 796 884 481.
As a consequence, 264 191 is the square root of 69 796 884 481.
The multiples of 264 191 are all integers evenly divisible by 264 191, that is all numbers such that the remainder of the division by 264 191 is zero. There are infinitely many multiples of 264 191. The smallest multiples of 264 191 are: