2183855172 has 12 divisors (see below), whose sum is σ = 5095662096. Its totient is φ = 727951720.

The previous prime is 2183855137. The next prime is 2183855197. The reversal of 2183855172 is 2715583812.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×2183855172² = 9538446824542299168, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90993954 + ... + 90993977.

It is an arithmetic number, because the mean of its divisors is an integer number (424638508).

Almost surely, 2^2183855172 is an apocalyptic number.

It is an amenable number.

2183855172 is an abundant number, since it is smaller than the sum of its proper divisors (2911806924).

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

2183855172 is a wasteful number, since it uses less digits than its factorization.

2183855172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181987938 (or 181987936 counting only the distinct ones).

The product of its digits is 134400, while the sum is 42.

The square root of 2183855172 is about 46731.7362399473. The cubic root of 2183855172 is about 1297.4021437851.

The spelling of 2183855172 in words is "two billion, one hundred eighty-three million, eight hundred fifty-five thousand, one hundred seventy-two".