2181855332 has 12 divisors (see below), whose sum is σ = 3830526336. Its totient is φ = 1087419240.

The previous prime is 2181855311. The next prime is 2181855343. The reversal of 2181855332 is 2335581812.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 875708 + ... + 878195.

It is an arithmetic number, because the mean of its divisors is an integer number (319210528).

Almost surely, 2^2181855332 is an apocalyptic number.

It is an amenable number.

2181855332 is a deficient number, since it is larger than the sum of its proper divisors (1648671004).

2181855332 is a wasteful number, since it uses less digits than its factorization.

2181855332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1754218 (or 1754216 counting only the distinct ones).

The product of its digits is 57600, while the sum is 38.

The square root of 2181855332 is about 46710.3343169368. The cubic root of 2181855332 is about 1297.0059958582.

The spelling of 2181855332 in words is "two billion, one hundred eighty-one million, eight hundred fifty-five thousand, three hundred thirty-two".