215881116 has 48 divisors (see below), whose sum is σ = 578444160. Its totient is φ = 61974720.

The previous prime is 215881093. The next prime is 215881153. The reversal of 215881116 is 611188512.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

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, 40531 + ... + 45546.

It is an arithmetic number, because the mean of its divisors is an integer number (12050920).

Almost surely, 2^215881116 is an apocalyptic number.

It is an amenable number.

215881116 is an abundant number, since it is smaller than the sum of its proper divisors (362563044).

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

215881116 is a wasteful number, since it uses less digits than its factorization.

215881116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86114 (or 86112 counting only the distinct ones).

The product of its digits is 3840, while the sum is 33.

The square root of 215881116 is about 14692.8933842181. The cubic root of 215881116 is about 599.8899020208.

The spelling of 215881116 in words is "two hundred fifteen million, eight hundred eighty-one thousand, one hundred sixteen".