22185222 has 32 divisors (see below), whose sum is σ = 45702144. Its totient is φ = 7176000.

The previous prime is 22185197. The next prime is 22185227. The reversal of 22185222 is 22258122.

It is a junction number, because it is equal to n+sod(n) for n = 22185192 and 22185201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22185227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42322 + ... + 42842.

It is an arithmetic number, because the mean of its divisors is an integer number (1428192).

Almost surely, 2^22185222 is an apocalyptic number.

22185222 is an abundant number, since it is smaller than the sum of its proper divisors (23516922).

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

22185222 is a wasteful number, since it uses less digits than its factorization.

22185222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724.

The product of its digits is 1280, while the sum is 24.

The square root of 22185222 is about 4710.1191067743. The cubic root of 22185222 is about 280.9880991063.

Subtracting 22185222 from its reverse (22258122), we obtain a square (72900 = 270²).

The spelling of 22185222 in words is "twenty-two million, one hundred eighty-five thousand, two hundred twenty-two".