2173812812 has 24 divisors (see below), whose sum is σ = 3819974256. Its totient is φ = 1082403008.

The previous prime is 2173812811. The next prime is 2173812881. The reversal of 2173812812 is 2182183712.

It is not an unprimeable number, because it can be changed into a prime (2173812811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1253498 + ... + 1255230.

It is an arithmetic number, because the mean of its divisors is an integer number (159165594).

Almost surely, 2^2173812812 is an apocalyptic number.

It is an amenable number.

2173812812 is a deficient number, since it is larger than the sum of its proper divisors (1646161444).

2173812812 is a wasteful number, since it uses less digits than its factorization.

2173812812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2857 (or 2855 counting only the distinct ones).

The product of its digits is 10752, while the sum is 35.

The square root of 2173812812 is about 46624.1655367686. The cubic root of 2173812812 is about 1295.4104058415.

The spelling of 2173812812 in words is "two billion, one hundred seventy-three million, eight hundred twelve thousand, eight hundred twelve".