22151856 has 40 divisors (see below), whose sum is σ = 59075584. Its totient is φ = 7145280.

The previous prime is 22151819. The next prime is 22151869. The reversal of 22151856 is 65815122.

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, 5956 + ... + 8931.

Almost surely, 2^22151856 is an apocalyptic number.

It is an amenable number.

22151856 is an abundant number, since it is smaller than the sum of its proper divisors (36923728).

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

22151856 is a wasteful number, since it uses less digits than its factorization.

22151856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14929 (or 14923 counting only the distinct ones).

The product of its digits is 4800, while the sum is 30.

The square root of 22151856 is about 4706.5758253745. The cubic root of 22151856 is about 280.8471621500.

Adding to 22151856 its reverse (65815122), we get a palindrome (87966978).

The spelling of 22151856 in words is "twenty-two million, one hundred fifty-one thousand, eight hundred fifty-six".