2112660172 has 24 divisors (see below), whose sum is σ = 4236374016. Its totient is φ = 903057168.

The previous prime is 2112660161. The next prime is 2112660211. The reversal of 2112660172 is 2710662112.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 2112660172.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87778 + ... + 109225.

It is an arithmetic number, because the mean of its divisors is an integer number (176515584).

Almost surely, 2^2112660172 is an apocalyptic number.

It is an amenable number.

2112660172 is an abundant number, since it is smaller than the sum of its proper divisors (2123713844).

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

2112660172 is a wasteful number, since it uses less digits than its factorization.

2112660172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197397 (or 197395 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 2112660172 is about 45963.6831857500. The cubic root of 2112660172 is about 1283.1474001649.

The spelling of 2112660172 in words is "two billion, one hundred twelve million, six hundred sixty thousand, one hundred seventy-two".