2163938172 has 48 divisors (see below), whose sum is σ = 5550297984. Its totient is φ = 650728000.

The previous prime is 2163938171. The next prime is 2163938207. The reversal of 2163938172 is 2718393612.

2163938172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2163938171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45279 + ... + 79862.

It is an arithmetic number, because the mean of its divisors is an integer number (115631208).

Almost surely, 2^2163938172 is an apocalyptic number.

2163938172 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2163938172 is an abundant number, since it is smaller than the sum of its proper divisors (3386359812).

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

2163938172 is a wasteful number, since it uses less digits than its factorization.

2163938172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125290 (or 125288 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 2163938172 is about 46518.1488453700. The cubic root of 2163938172 is about 1293.4459420910.

The spelling of 2163938172 in words is "two billion, one hundred sixty-three million, nine hundred thirty-eight thousand, one hundred seventy-two".