It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 495 213 is not a prime number.
For example, 495 213 can be divided by 3: 495 213 / 3 = 165 071.
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For 495 213 to be a prime number, it would have been required that 495 213 has only two divisors, i.e., itself and 1.
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495 213 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 495 213 is about 703.714.
Thus, the square root of 495 213 is not an integer, and therefore 495 213 is not a square number.
The square of a number (here 495 213) is the result of the product of this number (495 213) by itself (i.e., 495 213 × 495 213); the square of 495 213 is sometimes called "raising 495 213 to the power 2", or "495 213 squared".
The square of 495 213 is 245 235 915 369 because 495 213 × 495 213 = 495 2132 = 245 235 915 369.
As a consequence, 495 213 is the square root of 245 235 915 369.
The multiples of 495 213 are all integers evenly divisible by 495 213, that is all numbers such that the remainder of the division by 495 213 is zero. There are infinitely many multiples of 495 213. The smallest multiples of 495 213 are: