216345512 has 32 divisors (see below), whose sum is σ = 425502720. Its totient is φ = 103003200.

The previous prime is 216345511. The next prime is 216345517. The reversal of 216345512 is 215543612.

216345512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (216345511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6137 + ... + 21687.

It is an arithmetic number, because the mean of its divisors is an integer number (13296960).

Almost surely, 2^216345512 is an apocalyptic number.

It is an amenable number.

216345512 is a deficient number, since it is larger than the sum of its proper divisors (209157208).

216345512 is a wasteful number, since it uses less digits than its factorization.

216345512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15641 (or 15637 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 216345512 is about 14708.6883167739. The cubic root of 216345512 is about 600.3197480902.

The spelling of 216345512 in words is "two hundred sixteen million, three hundred forty-five thousand, five hundred twelve".