216464512 has 32 divisors (see below), whose sum is σ = 470444400. Its totient is φ = 98392320.

The previous prime is 216464509. The next prime is 216464527. The reversal of 216464512 is 215464612.

It is a happy number.

216464512 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 (32).

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, 75462 + ... + 78277.

Almost surely, 2^216464512 is an apocalyptic number.

216464512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

216464512 is an abundant number, since it is smaller than the sum of its proper divisors (253979888).

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

216464512 is a wasteful number, since it uses less digits than its factorization.

216464512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153764 (or 153752 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 216464512 is about 14712.7329888094. The cubic root of 216464512 is about 600.4297957562.

The spelling of 216464512 in words is "two hundred sixteen million, four hundred sixty-four thousand, five hundred twelve".