22155180 has 24 divisors (see below), whose sum is σ = 62034672. Its totient is φ = 5908032.

The previous prime is 22155179. The next prime is 22155209. The reversal of 22155180 is 8155122.

It is a self number, because there is not a number n which added to its sum of digits gives 22155180.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184567 + ... + 184686.

It is an arithmetic number, because the mean of its divisors is an integer number (2584778).

Almost surely, 2^22155180 is an apocalyptic number.

22155180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22155180 is an abundant number, since it is smaller than the sum of its proper divisors (39879492).

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

22155180 is a wasteful number, since it uses less digits than its factorization.

22155180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369265 (or 369263 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 22155180 is about 4706.9289350913. The cubic root of 22155180 is about 280.8612089682.

The spelling of 22155180 in words is "twenty-two million, one hundred fifty-five thousand, one hundred eighty".