216610122 has 48 divisors (see below), whose sum is σ = 451761120. Its totient is φ = 69218592.

The previous prime is 216610111. The next prime is 216610123. The reversal of 216610122 is 221016612.

216610122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (216610123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 781848 + ... + 782124.

It is an arithmetic number, because the mean of its divisors is an integer number (9411690).

Almost surely, 2^216610122 is an apocalyptic number.

216610122 is an abundant number, since it is smaller than the sum of its proper divisors (235150998).

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

216610122 is a wasteful number, since it uses less digits than its factorization.

216610122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435 (or 388 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 216610122 is about 14717.6805917237. The cubic root of 216610122 is about 600.5643967052.

Adding to 216610122 its reverse (221016612), we get a palindrome (437626734).

The spelling of 216610122 in words is "two hundred sixteen million, six hundred ten thousand, one hundred twenty-two".