216538234 has 8 divisors (see below), whose sum is σ = 354335328. Its totient is φ = 98426460.

The previous prime is 216538229. The next prime is 216538237. The reversal of 216538234 is 432835612.

216538234 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 216538234.

It is not an unprimeable number, because it can be changed into a prime (216538237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4921302 + ... + 4921345.

It is an arithmetic number, because the mean of its divisors is an integer number (44291916).

Almost surely, 2^216538234 is an apocalyptic number.

216538234 is a deficient number, since it is larger than the sum of its proper divisors (137797094).

216538234 is a wasteful number, since it uses less digits than its factorization.

216538234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9842660.

The product of its digits is 34560, while the sum is 34.

The square root of 216538234 is about 14715.2381564146. The cubic root of 216538234 is about 600.4979514411.

The spelling of 216538234 in words is "two hundred sixteen million, five hundred thirty-eight thousand, two hundred thirty-four".