422217891 has 6 divisors (see below), whose sum is σ = 609870300. Its totient is φ = 281478588.

The previous prime is 422217883. The next prime is 422217919. The reversal of 422217891 is 198712224.

It is not a de Polignac number, because 422217891 - 2³ = 422217883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (422217821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23456541 + ... + 23456558.

It is an arithmetic number, because the mean of its divisors is an integer number (101645050).

Almost surely, 2^422217891 is an apocalyptic number.

422217891 is a deficient number, since it is larger than the sum of its proper divisors (187652409).

422217891 is a wasteful number, since it uses less digits than its factorization.

422217891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46913105 (or 46913102 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 422217891 is about 20547.9412837394. The cubic root of 422217891 is about 750.2031396407.

The spelling of 422217891 in words is "four hundred twenty-two million, two hundred seventeen thousand, eight hundred ninety-one".