216015808 has 14 divisors (see below), whose sum is σ = 428656496. Its totient is φ = 108007872.

The previous prime is 216015803. The next prime is 216015817. The reversal of 216015808 is 808510612.

It is a self number, because there is not a number n which added to its sum of digits gives 216015808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216015803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1687560 + ... + 1687687.

Almost surely, 2^216015808 is an apocalyptic number.

It is an amenable number.

216015808 is a deficient number, since it is larger than the sum of its proper divisors (212640688).

216015808 is an equidigital number, since it uses as much as digits as its factorization.

216015808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3375259 (or 3375249 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 216015808 is about 14697.4762459410. The cubic root of 216015808 is about 600.0146366800.

The spelling of 216015808 in words is "two hundred sixteen million, fifteen thousand, eight hundred eight".