216915206 has 8 divisors (see below), whose sum is σ = 344512440. Its totient is φ = 102077728.

The previous prime is 216915203. The next prime is 216915221. The reversal of 216915206 is 602519612.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216915203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3189896 + ... + 3189963.

It is an arithmetic number, because the mean of its divisors is an integer number (43064055).

Almost surely, 2^216915206 is an apocalyptic number.

216915206 is a deficient number, since it is larger than the sum of its proper divisors (127597234).

216915206 is a wasteful number, since it uses less digits than its factorization.

216915206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6379878.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 216915206 is about 14728.0414855472. The cubic root of 216915206 is about 600.8462189244.

The spelling of 216915206 in words is "two hundred sixteen million, nine hundred fifteen thousand, two hundred six".