216309044 has 12 divisors (see below), whose sum is σ = 432618144. Its totient is φ = 92703864.

The previous prime is 216309029. The next prime is 216309073. The reversal of 216309044 is 440903612.

216309044 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

216309044 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 216308998 and 216309016.

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, 3862634 + ... + 3862689.

It is an arithmetic number, because the mean of its divisors is an integer number (36051512).

Almost surely, 2^216309044 is an apocalyptic number.

It is an amenable number.

216309044 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

216309044 is a wasteful number, since it uses less digits than its factorization.

216309044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7725334 (or 7725332 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 216309044 is about 14707.4485890653. The cubic root of 216309044 is about 600.2860154888.

The spelling of 216309044 in words is "two hundred sixteen million, three hundred nine thousand, forty-four".