81832232 has 24 divisors (see below), whose sum is σ = 156048750. Its totient is φ = 40230720.

The previous prime is 81832213. The next prime is 81832243. The reversal of 81832232 is 23223818.

It can be written as a sum of positive squares in 3 ways, for example, as 10023556 + 71808676 = 3166^2 + 8474^2 .

It is a junction number, because it is equal to n+sod(n) for n = 81832195 and 81832204.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28394 + ... + 31142.

Almost surely, 2^81832232 is an apocalyptic number.

It is an amenable number.

81832232 is a deficient number, since it is larger than the sum of its proper divisors (74216518).

81832232 is a wasteful number, since it uses less digits than its factorization.

81832232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2877 (or 2812 counting only the distinct ones).

The product of its digits is 4608, while the sum is 29.

The square root of 81832232 is about 9046.1169570153. The cubic root of 81832232 is about 434.1516597111.

The spelling of 81832232 in words is "eighty-one million, eight hundred thirty-two thousand, two hundred thirty-two".