It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 378 307 216 is not a prime number.
For example, 378 307 216 can be divided by 2: 378 307 216 / 2 = 189 153 608.
For 378 307 216 to be a prime number, it would have been required that 378 307 216 has only two divisors, i.e., itself and 1.
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378 307 216 is an even number, because it is evenly divisible by 2: 378 307 216 / 2 = 189 153 608.
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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 378 307 216 is about 19 450.121.
Thus, the square root of 378 307 216 is not an integer, and therefore 378 307 216 is not a square number.
The square of a number (here 378 307 216) is the result of the product of this number (378 307 216) by itself (i.e., 378 307 216 × 378 307 216); the square of 378 307 216 is sometimes called "raising 378 307 216 to the power 2", or "378 307 216 squared".
The square of 378 307 216 is 143 116 349 677 670 656 because 378 307 216 × 378 307 216 = 378 307 2162 = 143 116 349 677 670 656.
As a consequence, 378 307 216 is the square root of 143 116 349 677 670 656.
378 307 216 is a number with 9 digits.
The multiples of 378 307 216 are all integers evenly divisible by 378 307 216, that is all numbers such that the remainder of the division by 378 307 216 is zero. There are infinitely many multiples of 378 307 216. The smallest multiples of 378 307 216 are: