216307012 has 24 divisors (see below), whose sum is σ = 383259800. Its totient is φ = 106811136.

The previous prime is 216307009. The next prime is 216307033. The reversal of 216307012 is 210703612.

It can be written as a sum of positive squares in 4 ways, for example, as 40373316 + 175933696 = 6354^2 + 13264^2 .

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177718 + ... + 178930.

Almost surely, 2^216307012 is an apocalyptic number.

It is an amenable number.

216307012 is a deficient number, since it is larger than the sum of its proper divisors (166952788).

216307012 is a wasteful number, since it uses less digits than its factorization.

216307012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1735 (or 1733 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 216307012 is about 14707.3795082605. The cubic root of 216307012 is about 600.2841357939.

The spelling of 216307012 in words is "two hundred sixteen million, three hundred seven thousand, twelve".