22112400 has 60 divisors (see below), whose sum is σ = 70837232. Its totient is φ = 5896320.

The previous prime is 22112381. The next prime is 22112401. The reversal of 22112400 is 421122.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (22112401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8014 + ... + 10413.

Almost surely, 2^22112400 is an apocalyptic number.

22112400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22112400 is an abundant number, since it is smaller than the sum of its proper divisors (48724832).

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

22112400 is a wasteful number, since it uses less digits than its factorization.

22112400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18448 (or 18437 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 22112400 is about 4702.3823749244. The cubic root of 22112400 is about 280.6803184746.

Adding to 22112400 its reverse (421122), we get a palindrome (22533522).

It can be divided in two parts, 221 and 12400, that added together give a palindrome (12621).

The spelling of 22112400 in words is "twenty-two million, one hundred twelve thousand, four hundred".