216915696 has 30 divisors (see below), whose sum is σ = 607063080. Its totient is φ = 72305184.

The previous prime is 216915689. The next prime is 216915701. The reversal of 216915696 is 696519612.

It is a happy number.

216915696 is a `hidden beast` number, since 21 + 69 + 1 + 569 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 753036 + ... + 753323.

It is an arithmetic number, because the mean of its divisors is an integer number (20235436).

Almost surely, 2^216915696 is an apocalyptic number.

It is an amenable number.

216915696 is an abundant number, since it is smaller than the sum of its proper divisors (390147384).

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

216915696 is a wasteful number, since it uses less digits than its factorization.

216915696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1506373 (or 1506364 counting only the distinct ones).

The product of its digits is 174960, while the sum is 45.

The square root of 216915696 is about 14728.0581204720. The cubic root of 216915696 is about 600.8466713507.

The spelling of 216915696 in words is "two hundred sixteen million, nine hundred fifteen thousand, six hundred ninety-six".