891123222 has 16 divisors (see below), whose sum is σ = 1944268992. Its totient is φ = 270037320.

The previous prime is 891123203. The next prime is 891123227. The reversal of 891123222 is 222321198.

It is a super-2 number, since 2×891123222² = 1588201193575322568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 891123222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891123227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6750868 + ... + 6750999.

It is an arithmetic number, because the mean of its divisors is an integer number (121516812).

Almost surely, 2^891123222 is an apocalyptic number.

891123222 is an abundant number, since it is smaller than the sum of its proper divisors (1053145770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

891123222 is a wasteful number, since it uses less digits than its factorization.

891123222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13501883.

The product of its digits is 3456, while the sum is 30.

The square root of 891123222 is about 29851.6870880022. The cubic root of 891123222 is about 962.3046559658.

The spelling of 891123222 in words is "eight hundred ninety-one million, one hundred twenty-three thousand, two hundred twenty-two".