It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 42 638 722 is not a prime number.
For example, 42 638 722 can be divided by 2: 42 638 722 / 2 = 21 319 361.
For 42 638 722 to be a prime number, it would have been required that 42 638 722 has only two divisors, i.e., itself and 1.
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42 638 722 is an even number, because it is evenly divisible by 2: 42 638 722 / 2 = 21 319 361.
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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 42 638 722 is about 6 529.833.
Thus, the square root of 42 638 722 is not an integer, and therefore 42 638 722 is not a square number.
The square of a number (here 42 638 722) is the result of the product of this number (42 638 722) by itself (i.e., 42 638 722 × 42 638 722); the square of 42 638 722 is sometimes called "raising 42 638 722 to the power 2", or "42 638 722 squared".
The square of 42 638 722 is 1 818 060 613 793 284 because 42 638 722 × 42 638 722 = 42 638 7222 = 1 818 060 613 793 284.
As a consequence, 42 638 722 is the square root of 1 818 060 613 793 284.
42 638 722 is a number with 8 digits.
The multiples of 42 638 722 are all integers evenly divisible by 42 638 722, that is all numbers such that the remainder of the division by 42 638 722 is zero. There are infinitely many multiples of 42 638 722. The smallest multiples of 42 638 722 are: