It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 400 139 213 is not a prime number.
For example, 400 139 213 can be divided by 41: 400 139 213 / 41 = 9 759 493.
For 400 139 213 to be a prime number, it would have been required that 400 139 213 has only two divisors, i.e., itself and 1.
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400 139 213 is an odd number, because it is not evenly divisible by 2.
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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 400 139 213 is about 20 003.480.
Thus, the square root of 400 139 213 is not an integer, and therefore 400 139 213 is not a square number.
The square of a number (here 400 139 213) is the result of the product of this number (400 139 213) by itself (i.e., 400 139 213 × 400 139 213); the square of 400 139 213 is sometimes called "raising 400 139 213 to the power 2", or "400 139 213 squared".
The square of 400 139 213 is 160 111 389 780 259 360 because 400 139 213 × 400 139 213 = 400 139 2132 = 160 111 389 780 259 360.
As a consequence, 400 139 213 is the square root of 160 111 389 780 259 360.
400 139 213 is a number with 9 digits.
The multiples of 400 139 213 are all integers evenly divisible by 400 139 213, that is all numbers such that the remainder of the division by 400 139 213 is zero. There are infinitely many multiples of 400 139 213. The smallest multiples of 400 139 213 are: