It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 402 401 822 is not a prime number.
For example, 402 401 822 can be divided by 2: 402 401 822 / 2 = 201 200 911.
For 402 401 822 to be a prime number, it would have been required that 402 401 822 has only two divisors, i.e., itself and 1.
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402 401 822 is an even number, because it is evenly divisible by 2: 402 401 822 / 2 = 201 200 911.
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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 402 401 822 is about 20 059.956.
Thus, the square root of 402 401 822 is not an integer, and therefore 402 401 822 is not a square number.
The square of a number (here 402 401 822) is the result of the product of this number (402 401 822) by itself (i.e., 402 401 822 × 402 401 822); the square of 402 401 822 is sometimes called "raising 402 401 822 to the power 2", or "402 401 822 squared".
The square of 402 401 822 is 161 927 226 348 919 680 because 402 401 822 × 402 401 822 = 402 401 8222 = 161 927 226 348 919 680.
As a consequence, 402 401 822 is the square root of 161 927 226 348 919 680.
402 401 822 is a number with 9 digits.
The multiples of 402 401 822 are all integers evenly divisible by 402 401 822, that is all numbers such that the remainder of the division by 402 401 822 is zero. There are infinitely many multiples of 402 401 822. The smallest multiples of 402 401 822 are: