216915168 has 48 divisors (see below), whose sum is σ = 570810240. Its totient is φ = 72126336.

The previous prime is 216915163. The next prime is 216915169. The reversal of 216915168 is 861519612.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216915163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39571 + ... + 44717.

It is an arithmetic number, because the mean of its divisors is an integer number (11891880).

Almost surely, 2^216915168 is an apocalyptic number.

It is an amenable number.

216915168 is an abundant number, since it is smaller than the sum of its proper divisors (353895072).

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

216915168 is a wasteful number, since it uses less digits than its factorization.

216915168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5599 (or 5591 counting only the distinct ones).

The product of its digits is 25920, while the sum is 39.

The square root of 216915168 is about 14728.0401954910. The cubic root of 216915168 is about 600.8461838383.

The spelling of 216915168 in words is "two hundred sixteen million, nine hundred fifteen thousand, one hundred sixty-eight".