2178612212 has 24 divisors (see below), whose sum is σ = 4397205120. Its totient is φ = 925123680.

The previous prime is 2178612199. The next prime is 2178612239. The reversal of 2178612212 is 2122168712.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353864 + ... + 359967.

It is an arithmetic number, because the mean of its divisors is an integer number (183216880).

Almost surely, 2^2178612212 is an apocalyptic number.

It is an amenable number.

2178612212 is an abundant number, since it is smaller than the sum of its proper divisors (2218592908).

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

2178612212 is a wasteful number, since it uses less digits than its factorization.

2178612212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713951 (or 713949 counting only the distinct ones).

The product of its digits is 5376, while the sum is 32.

The square root of 2178612212 is about 46675.6061771028. The cubic root of 2178612212 is about 1296.3630519293.

The spelling of 2178612212 in words is "two billion, one hundred seventy-eight million, six hundred twelve thousand, two hundred twelve".