215616912 has 80 divisors (see below), whose sum is σ = 644720640. Its totient is φ = 60817536.

The previous prime is 215616887. The next prime is 215616923. The reversal of 215616912 is 219616512.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22483 + ... + 30605.

It is an arithmetic number, because the mean of its divisors is an integer number (8059008).

Almost surely, 2^215616912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215616912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322360320).

215616912 is an abundant number, since it is smaller than the sum of its proper divisors (429103728).

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

215616912 is a wasteful number, since it uses less digits than its factorization.

215616912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8220 (or 8214 counting only the distinct ones).

The product of its digits is 6480, while the sum is 33.

The square root of 215616912 is about 14683.8997544930. The cubic root of 215616912 is about 599.6450789821.

The spelling of 215616912 in words is "two hundred fifteen million, six hundred sixteen thousand, nine hundred twelve".