216231112 has 16 divisors (see below), whose sum is σ = 407358000. Its totient is φ = 107602320.

The previous prime is 216231083. The next prime is 216231121. The reversal of 216231112 is 211132612.

216231112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 216231112.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62362 + ... + 65737.

It is an arithmetic number, because the mean of its divisors is an integer number (25459875).

Almost surely, 2^216231112 is an apocalyptic number.

It is an amenable number.

216231112 is a deficient number, since it is larger than the sum of its proper divisors (191126888).

216231112 is a wasteful number, since it uses less digits than its factorization.

216231112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128316 (or 128312 counting only the distinct ones).

The product of its digits is 144, while the sum is 19.

The square root of 216231112 is about 14704.7989445623. The cubic root of 216231112 is about 600.2139163165.

Adding to 216231112 its reverse (211132612), we get a palindrome (427363724).

The spelling of 216231112 in words is "two hundred sixteen million, two hundred thirty-one thousand, one hundred twelve".