216534732 has 12 divisors (see below), whose sum is σ = 505247736. Its totient is φ = 72178240.

The previous prime is 216534707. The next prime is 216534739. The reversal of 216534732 is 237435612.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 216534693 and 216534702.

It is not an unprimeable number, because it can be changed into a prime (216534739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9022269 + ... + 9022292.

It is an arithmetic number, because the mean of its divisors is an integer number (42103978).

Almost surely, 2^216534732 is an apocalyptic number.

It is an amenable number.

216534732 is an abundant number, since it is smaller than the sum of its proper divisors (288713004).

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

216534732 is a wasteful number, since it uses less digits than its factorization.

216534732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18044568 (or 18044566 counting only the distinct ones).

The product of its digits is 30240, while the sum is 33.

The square root of 216534732 is about 14715.1191636357. The cubic root of 216534732 is about 600.4947142065.

The spelling of 216534732 in words is "two hundred sixteen million, five hundred thirty-four thousand, seven hundred thirty-two".