216539208 has 48 divisors (see below), whose sum is σ = 594734400. Its totient is φ = 71161440.

The previous prime is 216539189. The next prime is 216539221. The reversal of 216539208 is 802935612.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16068 + ... + 26291.

It is an arithmetic number, because the mean of its divisors is an integer number (12390300).

Almost surely, 2^216539208 is an apocalyptic number.

It is an amenable number.

216539208 is an abundant number, since it is smaller than the sum of its proper divisors (378195192).

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

216539208 is a wasteful number, since it uses less digits than its factorization.

216539208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42442 (or 42435 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 216539208 is about 14715.2712513226. The cubic root of 216539208 is about 600.4988517965.

The spelling of 216539208 in words is "two hundred sixteen million, five hundred thirty-nine thousand, two hundred eight".