It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 243 144 is not a prime number.
For example, 243 144 can be divided by 2: 243 144 / 2 = 121 572.
For 243 144 to be a prime number, it would have been required that 243 144 has only two divisors, i.e., itself and 1.
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243 144 is an even number, because it is evenly divisible by 2: 243 144 / 2 = 121 572.
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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 243 144 is about 493.096.
Thus, the square root of 243 144 is not an integer, and therefore 243 144 is not a square number.
The square of a number (here 243 144) is the result of the product of this number (243 144) by itself (i.e., 243 144 × 243 144); the square of 243 144 is sometimes called "raising 243 144 to the power 2", or "243 144 squared".
The square of 243 144 is 59 119 004 736 because 243 144 × 243 144 = 243 1442 = 59 119 004 736.
As a consequence, 243 144 is the square root of 59 119 004 736.
The multiples of 243 144 are all integers evenly divisible by 243 144, that is all numbers such that the remainder of the division by 243 144 is zero. There are infinitely many multiples of 243 144. The smallest multiples of 243 144 are: