2161791232 has 36 divisors (see below), whose sum is σ = 4320778896. Its totient is φ = 1079482880.

The previous prime is 2161791227. The next prime is 2161791239. The reversal of 2161791232 is 2321971612.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2161791239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206607 + ... + 216817.

It is an arithmetic number, because the mean of its divisors is an integer number (120021636).

Almost surely, 2^2161791232 is an apocalyptic number.

It is an amenable number.

2161791232 is a deficient number, since it is larger than the sum of its proper divisors (2158987664).

2161791232 is an equidigital number, since it uses as much as digits as its factorization.

2161791232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11054 (or 11040 counting only the distinct ones).

The product of its digits is 9072, while the sum is 34.

The square root of 2161791232 is about 46495.0667490649. The cubic root of 2161791232 is about 1293.0180386582.

The spelling of 2161791232 in words is "two billion, one hundred sixty-one million, seven hundred ninety-one thousand, two hundred thirty-two".