22931806 has 4 divisors (see below), whose sum is σ = 34397712. Its totient is φ = 11465902.

The previous prime is 22931789. The next prime is 22931809. The reversal of 22931806 is 60813922.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22931809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5732950 + ... + 5732953.

It is an arithmetic number, because the mean of its divisors is an integer number (8599428).

Almost surely, 2^22931806 is an apocalyptic number.

22931806 is a deficient number, since it is larger than the sum of its proper divisors (11465906).

22931806 is a wasteful number, since it uses less digits than its factorization.

22931806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11465905.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 22931806 is about 4788.7165295098. The cubic root of 22931806 is about 284.1053550135.

The spelling of 22931806 in words is "twenty-two million, nine hundred thirty-one thousand, eight hundred six".