216635232 has 96 divisors (see below), whose sum is σ = 623476224. Its totient is φ = 65318400.

The previous prime is 216635231. The next prime is 216635269. The reversal of 216635232 is 232536612.

216635232 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 216635232.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216635231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285798 + ... + 286554.

It is an arithmetic number, because the mean of its divisors is an integer number (6494544).

Almost surely, 2^216635232 is an apocalyptic number.

216635232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216635232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311738112).

216635232 is an abundant number, since it is smaller than the sum of its proper divisors (406840992).

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

216635232 is a wasteful number, since it uses less digits than its factorization.

216635232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052 (or 1044 counting only the distinct ones).

The product of its digits is 12960, while the sum is 30.

The square root of 216635232 is about 14718.5336226134. The cubic root of 216635232 is about 600.5876021295.

The spelling of 216635232 in words is "two hundred sixteen million, six hundred thirty-five thousand, two hundred thirty-two".