It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 53 664 is not a prime number.
For example, 53 664 can be divided by 2: 53 664 / 2 = 26 832.
For 53 664 to be a prime number, it would have been required that 53 664 has only two divisors, i.e., itself and 1.
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53 664 is an even number, because it is evenly divisible by 2: 53 664 / 2 = 26 832.
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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 53 664 is about 231.655.
Thus, the square root of 53 664 is not an integer, and therefore 53 664 is not a square number.
The square of a number (here 53 664) is the result of the product of this number (53 664) by itself (i.e., 53 664 × 53 664); the square of 53 664 is sometimes called "raising 53 664 to the power 2", or "53 664 squared".
The square of 53 664 is 2 879 824 896 because 53 664 × 53 664 = 53 6642 = 2 879 824 896.
As a consequence, 53 664 is the square root of 2 879 824 896.
The multiples of 53 664 are all integers evenly divisible by 53 664, that is all numbers such that the remainder of the division by 53 664 is zero. There are infinitely many multiples of 53 664. The smallest multiples of 53 664 are: