216301808 has 20 divisors (see below), whose sum is σ = 420263280. Its totient is φ = 107846784.

The previous prime is 216301783. The next prime is 216301819. The reversal of 216301808 is 808103612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13085 + ... + 24572.

It is an arithmetic number, because the mean of its divisors is an integer number (21013164).

Almost surely, 2^216301808 is an apocalyptic number.

It is an amenable number.

216301808 is a deficient number, since it is larger than the sum of its proper divisors (203961472).

216301808 is a wasteful number, since it uses less digits than its factorization.

216301808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38024 (or 38018 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 216301808 is about 14707.2025892078. The cubic root of 216301808 is about 600.2793217972.

The spelling of 216301808 in words is "two hundred sixteen million, three hundred one thousand, eight hundred eight".