216711612 has 120 divisors (see below), whose sum is σ = 636916896. Its totient is φ = 63752832.

The previous prime is 216711601. The next prime is 216711629. The reversal of 216711612 is 216117612.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 95758 + ... + 97994.

Almost surely, 2^216711612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216711612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318458448).

216711612 is an abundant number, since it is smaller than the sum of its proper divisors (420205284).

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

216711612 is a wasteful number, since it uses less digits than its factorization.

216711612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2289 (or 2278 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 216711612 is about 14721.1280817742. The cubic root of 216711612 is about 600.6581777394.

The spelling of 216711612 in words is "two hundred sixteen million, seven hundred eleven thousand, six hundred twelve".