216361215 has 36 divisors (see below), whose sum is σ = 436259304. Its totient is φ = 98906976.

The previous prime is 216361181. The next prime is 216361231. The reversal of 216361215 is 512163612.

216361215 is a `hidden beast` number, since 2 + 1 + 636 + 1 + 21 + 5 = 666.

It is not a de Polignac number, because 216361215 - 2⁷ = 216361087 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 46857 + ... + 51266.

It is an arithmetic number, because the mean of its divisors is an integer number (12118314).

Almost surely, 2^216361215 is an apocalyptic number.

216361215 is an abundant number, since it is smaller than the sum of its proper divisors (219898089).

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

216361215 is a wasteful number, since it uses less digits than its factorization.

216361215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98148 (or 98138 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 216361215 is about 14709.2221072360. Note that the first 3 decimals coincide. The cubic root of 216361215 is about 600.3342720691.

The spelling of 216361215 in words is "two hundred sixteen million, three hundred sixty-one thousand, two hundred fifteen".