216081884 has 24 divisors (see below), whose sum is σ = 381327408. Its totient is φ = 107136000.

The previous prime is 216081863. The next prime is 216081913. The reversal of 216081884 is 488180612.

216081884 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 374204 + ... + 374780.

It is an arithmetic number, because the mean of its divisors is an integer number (15888642).

Almost surely, 2^216081884 is an apocalyptic number.

It is an amenable number.

216081884 is a deficient number, since it is larger than the sum of its proper divisors (165245524).

216081884 is a wasteful number, since it uses less digits than its factorization.

216081884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205 (or 1203 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 38.

The square root of 216081884 is about 14699.7239429861. The cubic root of 216081884 is about 600.0758089398.

The spelling of 216081884 in words is "two hundred sixteen million, eighty-one thousand, eight hundred eighty-four".