216528890 has 16 divisors (see below), whose sum is σ = 390247200. Its totient is φ = 86501520.

The previous prime is 216528863. The next prime is 216528919. The reversal of 216528890 is 98825612.

216528890 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 5240 + ... + 21459.

It is an arithmetic number, because the mean of its divisors is an integer number (24390450).

Almost surely, 2^216528890 is an apocalyptic number.

216528890 is a deficient number, since it is larger than the sum of its proper divisors (173718310).

216528890 is a wasteful number, since it uses less digits than its factorization.

216528890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27517.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 216528890 is about 14714.9206589774. The cubic root of 216528890 is about 600.4893138078.

The spelling of 216528890 in words is "two hundred sixteen million, five hundred twenty-eight thousand, eight hundred ninety".