216560522100 has 72 divisors (see below), whose sum is σ = 674780387680. Its totient is φ = 53307204480.

The previous prime is 216560522081. The next prime is 216560522147. The reversal of 216560522100 is 1225065612.

216560522100 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27760270 + ... + 27768069.

Almost surely, 2^216560522100 is an apocalyptic number.

216560522100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216560522100 is an abundant number, since it is smaller than the sum of its proper divisors (458219865580).

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

216560522100 is a wasteful number, since it uses less digits than its factorization.

216560522100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55528369 (or 55528362 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 216560522100 its reverse (1225065612), we get a palindrome (217785587712).

The spelling of 216560522100 in words is "two hundred sixteen billion, five hundred sixty million, five hundred twenty-two thousand, one hundred".