216134172 has 18 divisors (see below), whose sum is σ = 546339248. Its totient is φ = 72044712.

The previous prime is 216134167. The next prime is 216134183. The reversal of 216134172 is 271431612.

216134172 is a `hidden beast` number, since 2 + 1 + 613 + 41 + 7 + 2 = 666.

216134172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×216134172² = 93427960612251168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3001828 + ... + 3001899.

Almost surely, 2^216134172 is an apocalyptic number.

It is an amenable number.

216134172 is an abundant number, since it is smaller than the sum of its proper divisors (330205076).

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

216134172 is a wasteful number, since it uses less digits than its factorization.

216134172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6003737 (or 6003732 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 216134172 is about 14701.5023722067. The cubic root of 216134172 is about 600.1242076190.

Adding to 216134172 its reverse (271431612), we get a palindrome (487565784).

The spelling of 216134172 in words is "two hundred sixteen million, one hundred thirty-four thousand, one hundred seventy-two".