215664112 has 20 divisors (see below), whose sum is σ = 419334520. Its totient is φ = 107448768.

The previous prime is 215664107. The next prime is 215664139. The reversal of 215664112 is 211466512.

215664112 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×215664112² = 93022018409497088, which contains 22 as substring.

It is a congruent number.

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, 19287 + ... + 28342.

It is an arithmetic number, because the mean of its divisors is an integer number (20966726).

Almost surely, 2^215664112 is an apocalyptic number.

It is an amenable number.

215664112 is a deficient number, since it is larger than the sum of its proper divisors (203670408).

215664112 is a wasteful number, since it uses less digits than its factorization.

215664112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47920 (or 47914 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 215664112 is about 14685.5068690189. The cubic root of 215664112 is about 599.6888312438.

The spelling of 215664112 in words is "two hundred fifteen million, six hundred sixty-four thousand, one hundred twelve".