216555006 has 32 divisors (see below), whose sum is σ = 460167840. Its totient is φ = 67810176.

The previous prime is 216554983. The next prime is 216555007. The reversal of 216555006 is 600555612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216555007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10381 + ... + 23256.

It is an arithmetic number, because the mean of its divisors is an integer number (14380245).

Almost surely, 2^216555006 is an apocalyptic number.

216555006 is an abundant number, since it is smaller than the sum of its proper divisors (243612834).

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

216555006 is a wasteful number, since it uses less digits than its factorization.

216555006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33708.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 216555006 is about 14715.8080308218. The cubic root of 216555006 is about 600.5134549258.

The spelling of 216555006 in words is "two hundred sixteen million, five hundred fifty-five thousand, six".