It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 242 578 138 is not a prime number.
For example, 242 578 138 can be divided by 2: 242 578 138 / 2 = 121 289 069.
For 242 578 138 to be a prime number, it would have been required that 242 578 138 has only two divisors, i.e., itself and 1.
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242 578 138 is an even number, because it is evenly divisible by 2: 242 578 138 / 2 = 121 289 069.
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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 242 578 138 is about 15 574.920.
Thus, the square root of 242 578 138 is not an integer, and therefore 242 578 138 is not a square number.
The square of a number (here 242 578 138) is the result of the product of this number (242 578 138) by itself (i.e., 242 578 138 × 242 578 138); the square of 242 578 138 is sometimes called "raising 242 578 138 to the power 2", or "242 578 138 squared".
The square of 242 578 138 is 58 844 153 035 547 040 because 242 578 138 × 242 578 138 = 242 578 1382 = 58 844 153 035 547 040.
As a consequence, 242 578 138 is the square root of 58 844 153 035 547 040.
242 578 138 is a number with 9 digits.
The multiples of 242 578 138 are all integers evenly divisible by 242 578 138, that is all numbers such that the remainder of the division by 242 578 138 is zero. There are infinitely many multiples of 242 578 138. The smallest multiples of 242 578 138 are: