216528818 has 16 divisors (see below), whose sum is σ = 354547584. Its totient is φ = 98358960.

The previous prime is 216528817. The next prime is 216528839. The reversal of 216528818 is 818825612.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (216528817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59096 + ... + 62652.

It is an arithmetic number, because the mean of its divisors is an integer number (22159224).

Almost surely, 2^216528818 is an apocalyptic number.

216528818 is a deficient number, since it is larger than the sum of its proper divisors (138018766).

216528818 is a wasteful number, since it uses less digits than its factorization.

216528818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6337.

The product of its digits is 61440, while the sum is 41.

The square root of 216528818 is about 14714.9182124808. The cubic root of 216528818 is about 600.4892472497.

The spelling of 216528818 in words is "two hundred sixteen million, five hundred twenty-eight thousand, eight hundred eighteen".