23112220 has 12 divisors (see below), whose sum is σ = 48535704. Its totient is φ = 9244880.

The previous prime is 23112209. The next prime is 23112239. The reversal of 23112220 is 2221132.

It is a self number, because there is not a number n which added to its sum of digits gives 23112220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 577786 + ... + 577825.

It is an arithmetic number, because the mean of its divisors is an integer number (4044642).

Almost surely, 2^23112220 is an apocalyptic number.

23112220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23112220 is an abundant number, since it is smaller than the sum of its proper divisors (25423484).

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

23112220 is a wasteful number, since it uses less digits than its factorization.

23112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155620 (or 1155618 counting only the distinct ones).

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

The square root of 23112220 is about 4807.5170306511. The cubic root of 23112220 is about 284.8484677170.

Adding to 23112220 its reverse (2221132), we get a palindrome (25333352).

It can be divided in two parts, 23112 and 220, that added together give a palindrome (23332).

The spelling of 23112220 in words is "twenty-three million, one hundred twelve thousand, two hundred twenty".