It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 133 563 is not a prime number.
For example, 133 563 can be divided by 3: 133 563 / 3 = 44 521.
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For 133 563 to be a prime number, it would have been required that 133 563 has only two divisors, i.e., itself and 1.
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133 563 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 133 563 is about 365.463.
Thus, the square root of 133 563 is not an integer, and therefore 133 563 is not a square number.
The square of a number (here 133 563) is the result of the product of this number (133 563) by itself (i.e., 133 563 × 133 563); the square of 133 563 is sometimes called "raising 133 563 to the power 2", or "133 563 squared".
The square of 133 563 is 17 839 074 969 because 133 563 × 133 563 = 133 5632 = 17 839 074 969.
As a consequence, 133 563 is the square root of 17 839 074 969.
The multiples of 133 563 are all integers evenly divisible by 133 563, that is all numbers such that the remainder of the division by 133 563 is zero. There are infinitely many multiples of 133 563. The smallest multiples of 133 563 are: