216560172 has 48 divisors (see below), whose sum is σ = 528281600. Its totient is φ = 68964480.

The previous prime is 216560171. The next prime is 216560177. The reversal of 216560172 is 271065612.

It is not an unprimeable number, because it can be changed into a prime (216560171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25704 + ... + 33072.

Almost surely, 2^216560172 is an apocalyptic number.

It is an amenable number.

216560172 is an abundant number, since it is smaller than the sum of its proper divisors (311721428).

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

216560172 is a wasteful number, since it uses less digits than its factorization.

216560172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7486 (or 7484 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 216560172 is about 14715.9835553048. The cubic root of 216560172 is about 600.5182300449.

The spelling of 216560172 in words is "two hundred sixteen million, five hundred sixty thousand, one hundred seventy-two".