It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 400 671 431 is not a prime number.
For example, 400 671 431 can be divided by 23: 400 671 431 / 23 = 17 420 497.
For 400 671 431 to be a prime number, it would have been required that 400 671 431 has only two divisors, i.e., itself and 1.
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400 671 431 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 400 671 431 is about 20 016.779.
Thus, the square root of 400 671 431 is not an integer, and therefore 400 671 431 is not a square number.
The square of a number (here 400 671 431) is the result of the product of this number (400 671 431) by itself (i.e., 400 671 431 × 400 671 431); the square of 400 671 431 is sometimes called "raising 400 671 431 to the power 2", or "400 671 431 squared".
The square of 400 671 431 is 160 537 595 619 587 776 because 400 671 431 × 400 671 431 = 400 671 4312 = 160 537 595 619 587 776.
As a consequence, 400 671 431 is the square root of 160 537 595 619 587 776.
400 671 431 is a number with 9 digits.
The multiples of 400 671 431 are all integers evenly divisible by 400 671 431, that is all numbers such that the remainder of the division by 400 671 431 is zero. There are infinitely many multiples of 400 671 431. The smallest multiples of 400 671 431 are: