216808214 has 16 divisors (see below), whose sum is σ = 372866208. Its totient is φ = 92619072.

The previous prime is 216808199. The next prime is 216808219. The reversal of 216808214 is 412808612.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216808219) 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, 20357 + ... + 29120.

It is an arithmetic number, because the mean of its divisors is an integer number (23304138).

Almost surely, 2^216808214 is an apocalyptic number.

216808214 is a deficient number, since it is larger than the sum of its proper divisors (156057994).

216808214 is a wasteful number, since it uses less digits than its factorization.

216808214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49799.

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 216808214 is about 14724.4087826982. The cubic root of 216808214 is about 600.7474148614.

The spelling of 216808214 in words is "two hundred sixteen million, eight hundred eight thousand, two hundred fourteen".