216309108 has 24 divisors (see below), whose sum is σ = 506990848. Its totient is φ = 71778816.

The previous prime is 216309077. The next prime is 216309113. The reversal of 216309108 is 801903612.

It is a congruent number.

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, 37741 + ... + 43092.

Almost surely, 2^216309108 is an apocalyptic number.

It is an amenable number.

216309108 is an abundant number, since it is smaller than the sum of its proper divisors (290681740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216309108 is a wasteful number, since it uses less digits than its factorization.

216309108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81063 (or 81061 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 216309108 is about 14707.4507648334. The cubic root of 216309108 is about 600.2860746916.

The spelling of 216309108 in words is "two hundred sixteen million, three hundred nine thousand, one hundred eight".