22156816 has 60 divisors (see below), whose sum is σ = 48760272. Its totient is φ = 9672000.

The previous prime is 22156807. The next prime is 22156819. The reversal of 22156816 is 61865122.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (22156819) 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, 169071 + ... + 169201.

Almost surely, 2^22156816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22156816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24380136).

22156816 is an abundant number, since it is smaller than the sum of its proper divisors (26603456).

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

22156816 is a wasteful number, since it uses less digits than its factorization.

22156816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 175 counting only the distinct ones).

The product of its digits is 5760, while the sum is 31.

The square root of 22156816 is about 4707.1027182334. The cubic root of 22156816 is about 280.8681219885.

The spelling of 22156816 in words is "twenty-two million, one hundred fifty-six thousand, eight hundred sixteen".