2166212 has 12 divisors (see below), whose sum is σ = 3811500. Its totient is φ = 1077216.

The previous prime is 2166179. The next prime is 2166221. The reversal of 2166212 is 2126612.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1308736 + 857476 = 1144^2 + 926^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 587 + ... + 2162.

It is an arithmetic number, because the mean of its divisors is an integer number (317625).

2^2166212 is an apocalyptic number.

It is an amenable number.

2166212 is a deficient number, since it is larger than the sum of its proper divisors (1645288).

2166212 is a wasteful number, since it uses less digits than its factorization.

2166212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2950 (or 2948 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 2166212 is about 1471.8056936974. The cubic root of 2166212 is about 129.3898826882.

The spelling of 2166212 in words is "two million, one hundred sixty-six thousand, two hundred twelve".