22105500 has 48 divisors (see below), whose sum is σ = 64375584. Its totient is φ = 5894400.

The previous prime is 22105469. The next prime is 22105529. The reversal of 22105500 is 550122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 22105500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5869 + ... + 8868.

It is an arithmetic number, because the mean of its divisors is an integer number (1341158).

Almost surely, 2^22105500 is an apocalyptic number.

22105500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22105500 is an abundant number, since it is smaller than the sum of its proper divisors (42270084).

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

22105500 is a wasteful number, since it uses less digits than its factorization.

22105500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14759 (or 14747 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 22105500 is about 4701.6486470173. The cubic root of 22105500 is about 280.6511207442.

Adding to 22105500 its reverse (550122), we get a palindrome (22655622).

The spelling of 22105500 in words is "twenty-two million, one hundred five thousand, five hundred".