216545112 has 72 divisors (see below), whose sum is σ = 682238700. Its totient is φ = 61869024.

The previous prime is 216545107. The next prime is 216545113. The reversal of 216545112 is 211545612.

216545112 is a `hidden beast` number, since 2 + 1 + 6 + 545 + 112 = 666.

216545112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216545113) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 27162 + ... + 34217.

Almost surely, 2^216545112 is an apocalyptic number.

It is an amenable number.

216545112 is an abundant number, since it is smaller than the sum of its proper divisors (465693588).

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

216545112 is a wasteful number, since it uses less digits than its factorization.

216545112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61405 (or 61391 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 216545112 is about 14715.4718578780. The cubic root of 216545112 is about 600.5043093347.

The spelling of 216545112 in words is "two hundred sixteen million, five hundred forty-five thousand, one hundred twelve".