216542208 has 44 divisors (see below), whose sum is σ = 577172120. Its totient is φ = 72179712.

The previous prime is 216542201. The next prime is 216542233. The reversal of 216542208 is 802245612.

It is not an unprimeable number, because it can be changed into a prime (216542201) 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, 32173 + ... + 38316.

Almost surely, 2^216542208 is an apocalyptic number.

It is an amenable number.

216542208 is an abundant number, since it is smaller than the sum of its proper divisors (360629912).

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

216542208 is an equidigital number, since it uses as much as digits as its factorization.

216542208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70512 (or 70494 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 216542208 is about 14715.3731858896. The cubic root of 216542208 is about 600.5016249483.

The spelling of 216542208 in words is "two hundred sixteen million, five hundred forty-two thousand, two hundred eight".