216612120 has 64 divisors (see below), whose sum is σ = 650844000. Its totient is φ = 57673728.

The previous prime is 216612119. The next prime is 216612131. The reversal of 216612120 is 21216612.

216612120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120186 + ... + 121974.

Almost surely, 2^216612120 is an apocalyptic number.

216612120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216612120 is an abundant number, since it is smaller than the sum of its proper divisors (434231880).

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

216612120 is a wasteful number, since it uses less digits than its factorization.

216612120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2812 (or 2808 counting only the distinct ones).

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

The square root of 216612120 is about 14717.7484691103. The cubic root of 216612120 is about 600.5662432240.

Adding to 216612120 its reverse (21216612), we get a palindrome (237828732).

The spelling of 216612120 in words is "two hundred sixteen million, six hundred twelve thousand, one hundred twenty".