2159866212 has 24 divisors (see below), whose sum is σ = 5759643456. Its totient is φ = 617104608.

The previous prime is 2159866207. The next prime is 2159866243. The reversal of 2159866212 is 2126689512.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 12856263 + ... + 12856430.

It is an arithmetic number, because the mean of its divisors is an integer number (239985144).

Almost surely, 2^2159866212 is an apocalyptic number.

It is an amenable number.

2159866212 is an abundant number, since it is smaller than the sum of its proper divisors (3599777244).

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

2159866212 is a wasteful number, since it uses less digits than its factorization.

2159866212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25712707 (or 25712705 counting only the distinct ones).

The product of its digits is 103680, while the sum is 42.

The square root of 2159866212 is about 46474.3608024898. The cubic root of 2159866212 is about 1292.6341248099.

The spelling of 2159866212 in words is "two billion, one hundred fifty-nine million, eight hundred sixty-six thousand, two hundred twelve".