216111132 has 48 divisors (see below), whose sum is σ = 579616800. Its totient is φ = 69552000.

The previous prime is 216111109. The next prime is 216111169. The reversal of 216111132 is 231111612.

216111132 is a `hidden beast` number, since 21 + 611 + 1 + 1 + 32 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31369 + ... + 37632.

It is an arithmetic number, because the mean of its divisors is an integer number (12075350).

Almost surely, 2^216111132 is an apocalyptic number.

It is an amenable number.

216111132 is an abundant number, since it is smaller than the sum of its proper divisors (363505668).

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

216111132 is a wasteful number, since it uses less digits than its factorization.

216111132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69043 (or 69035 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The square root of 216111132 is about 14700.7187579383. The cubic root of 216111132 is about 600.1028823577.

Adding to 216111132 its reverse (231111612), we get a palindrome (447222744).

The spelling of 216111132 in words is "two hundred sixteen million, one hundred eleven thousand, one hundred thirty-two".