216591934 has 32 divisors (see below), whose sum is σ = 372526560. Its totient is φ = 93560832.

The previous prime is 216591929. The next prime is 216591941. The reversal of 216591934 is 439195612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84037 + ... + 86575.

It is an arithmetic number, because the mean of its divisors is an integer number (11641455).

Almost surely, 2^216591934 is an apocalyptic number.

216591934 is a deficient number, since it is larger than the sum of its proper divisors (155934626).

216591934 is a wasteful number, since it uses less digits than its factorization.

216591934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2764.

The product of its digits is 58320, while the sum is 40.

The square root of 216591934 is about 14717.0626824785. The cubic root of 216591934 is about 600.5475871322.

The spelling of 216591934 in words is "two hundred sixteen million, five hundred ninety-one thousand, nine hundred thirty-four".