216215216 has 20 divisors (see below), whose sum is σ = 478762512. Its totient is φ = 92663616.

The previous prime is 216215201. The next prime is 216215243. The reversal of 216215216 is 612512612.

216215216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 965135 + ... + 965358.

Almost surely, 2^216215216 is an apocalyptic number.

It is an amenable number.

216215216 is an abundant number, since it is smaller than the sum of its proper divisors (262547296).

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

216215216 is a wasteful number, since it uses less digits than its factorization.

216215216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1930508 (or 1930502 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 216215216 is about 14704.2584308084. The cubic root of 216215216 is about 600.1992079271.

Adding to 216215216 its reverse (612512612), we get a palindrome (828727828).

The spelling of 216215216 in words is "two hundred sixteen million, two hundred fifteen thousand, two hundred sixteen".