217163180530828 has 24 divisors (see below), whose sum is σ = 434335580566272. Its totient is φ = 93067958905104.

The previous prime is 217163180530817. The next prime is 217163180530837. The reversal of 217163180530828 is 828035081361712.

It is a happy number.

217163180530828 is digitally balanced in base 2, 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, 80974000 + ... + 83612887.

It is an arithmetic number, because the mean of its divisors is an integer number (18097315856928).

Almost surely, 2^{217163180530828} is an apocalyptic number.

217163180530828 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

217163180530828 is an abundant number, since it is smaller than the sum of its proper divisors (217172400035444).

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

217163180530828 is a wasteful number, since it uses less digits than its factorization.

217163180530828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164634021 (or 164634019 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 55.

The spelling of 217163180530828 in words is "two hundred seventeen trillion, one hundred sixty-three billion, one hundred eighty million, five hundred thirty thousand, eight hundred twenty-eight".