216447512 has 8 divisors (see below), whose sum is σ = 405839100. Its totient is φ = 108223752.

The previous prime is 216447499. The next prime is 216447527. The reversal of 216447512 is 215744612.

216447512 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 (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13527962 + ... + 13527977.

Almost surely, 2^216447512 is an apocalyptic number.

It is an amenable number.

216447512 is a deficient number, since it is larger than the sum of its proper divisors (189391588).

216447512 is a wasteful number, since it uses less digits than its factorization.

216447512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27055945 (or 27055941 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 216447512 is about 14712.1552465980. The cubic root of 216447512 is about 600.4140771308.

The spelling of 216447512 in words is "two hundred sixteen million, four hundred forty-seven thousand, five hundred twelve".