422563391 has 4 divisors (see below), whose sum is σ = 422990784. Its totient is φ = 422136000.

The previous prime is 422563381. The next prime is 422563423. The reversal of 422563391 is 193365224.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-422563391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422563301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212210 + ... + 214191.

It is an arithmetic number, because the mean of its divisors is an integer number (105747696).

Almost surely, 2^422563391 is an apocalyptic number.

422563391 is a deficient number, since it is larger than the sum of its proper divisors (427393).

422563391 is an equidigital number, since it uses as much as digits as its factorization.

422563391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427392.

The product of its digits is 38880, while the sum is 35.

The square root of 422563391 is about 20556.3467328220. The cubic root of 422563391 is about 750.4077137266.

The spelling of 422563391 in words is "four hundred twenty-two million, five hundred sixty-three thousand, three hundred ninety-one".