22081232 has 20 divisors (see below), whose sum is σ = 45299556. Its totient is φ = 10391040.

The previous prime is 22081187. The next prime is 22081253. The reversal of 22081232 is 23218022.

It can be written as a sum of positive squares in 2 ways, for example, as 15649936 + 6431296 = 3956^2 + 2536^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40319 + ... + 40862.

Almost surely, 2^22081232 is an apocalyptic number.

It is an amenable number.

22081232 is an abundant number, since it is smaller than the sum of its proper divisors (23218324).

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

22081232 is a wasteful number, since it uses less digits than its factorization.

22081232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81206 (or 81200 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 22081232 is about 4699.0671414654. The cubic root of 22081232 is about 280.5483810747.

Adding to 22081232 its reverse (23218022), we get a palindrome (45299254).

The spelling of 22081232 in words is "twenty-two million, eighty-one thousand, two hundred thirty-two".