216516706 has 16 divisors (see below), whose sum is σ = 372350016. Its totient is φ = 92498256.

The previous prime is 216516691. The next prime is 216516757. The reversal of 216516706 is 607615612.

It is a happy number.

216516706 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 19956 + ... + 28831.

It is an arithmetic number, because the mean of its divisors is an integer number (23271876).

Almost surely, 2^216516706 is an apocalyptic number.

216516706 is a deficient number, since it is larger than the sum of its proper divisors (155833310).

216516706 is a wasteful number, since it uses less digits than its factorization.

216516706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49113.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 216516706 is about 14714.5066516007. The cubic root of 216516706 is about 600.4780504932.

The spelling of 216516706 in words is "two hundred sixteen million, five hundred sixteen thousand, seven hundred six".