422219891 has 4 divisors (see below), whose sum is σ = 422268000. Its totient is φ = 422171784.

The previous prime is 422219879. The next prime is 422219899. The reversal of 422219891 is 198912224.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 422219891 - 2²⁶ = 355111027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (422219899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6731 + ... + 29828.

It is an arithmetic number, because the mean of its divisors is an integer number (105567000).

Almost surely, 2^422219891 is an apocalyptic number.

422219891 is a deficient number, since it is larger than the sum of its proper divisors (48109).

422219891 is a wasteful number, since it uses less digits than its factorization.

422219891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48108.

The product of its digits is 20736, while the sum is 38.

The square root of 422219891 is about 20547.9899503577. The cubic root of 422219891 is about 750.2043241823.

The spelling of 422219891 in words is "four hundred twenty-two million, two hundred nineteen thousand, eight hundred ninety-one".