23011222 has 16 divisors (see below), whose sum is σ = 37875600. Its totient is φ = 10419552.

The previous prime is 23011211. The next prime is 23011229. The reversal of 23011222 is 22211032.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23011229) 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, 6972 + ... + 9727.

It is an arithmetic number, because the mean of its divisors is an integer number (2367225).

Almost surely, 2^23011222 is an apocalyptic number.

23011222 is a deficient number, since it is larger than the sum of its proper divisors (14864378).

23011222 is a wasteful number, since it uses less digits than its factorization.

23011222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16767.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 23011222 is about 4797.0013550134. The cubic root of 23011222 is about 284.4329424580.

Subtracting from 23011222 its sum of digits (13), we obtain a square (23011209 = 4797²).

Adding to 23011222 its reverse (22211032), we get a palindrome (45222254).

The spelling of 23011222 in words is "twenty-three million, eleven thousand, two hundred twenty-two".