22456881 has 12 divisors (see below), whose sum is σ = 34346052. Its totient is φ = 14090496.

The previous prime is 22456877. The next prime is 22456897. The reversal of 22456881 is 18865422.

It can be written as a sum of positive squares in 2 ways, for example, as 19184400 + 3272481 = 4380^2 + 1809^2 .

It is not a de Polignac number, because 22456881 - 2² = 22456877 is a prime.

It is a super-2 number, since 2×22456881² = 1008623008496322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22456831) 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, 73236 + ... + 73541.

It is an arithmetic number, because the mean of its divisors is an integer number (2862171).

Almost surely, 2^22456881 is an apocalyptic number.

It is an amenable number.

22456881 is a deficient number, since it is larger than the sum of its proper divisors (11889171).

22456881 is a wasteful number, since it uses less digits than its factorization.

22456881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146800 (or 146797 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 22456881 is about 4738.8691689052. The cubic root of 22456881 is about 282.1303531956.

The spelling of 22456881 in words is "twenty-two million, four hundred fifty-six thousand, eight hundred eighty-one".