216541992 has 32 divisors (see below), whose sum is σ = 554561280. Its totient is φ = 70419840.

The previous prime is 216541981. The next prime is 216542089. The reversal of 216541992 is 299145612.

It is a self number, because there is not a number n which added to its sum of digits gives 216541992.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109048 + ... + 111015.

It is an arithmetic number, because the mean of its divisors is an integer number (17330040).

Almost surely, 2^216541992 is an apocalyptic number.

It is an amenable number.

216541992 is an abundant number, since it is smaller than the sum of its proper divisors (338019288).

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

216541992 is a wasteful number, since it uses less digits than its factorization.

216541992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220113 (or 220109 counting only the distinct ones).

The product of its digits is 38880, while the sum is 39.

The square root of 216541992 is about 14715.3658466244. The cubic root of 216541992 is about 600.5014252822.

The spelling of 216541992 in words is "two hundred sixteen million, five hundred forty-one thousand, nine hundred ninety-two".