216157716 has 36 divisors (see below), whose sum is σ = 547019200. Its totient is φ = 71970768.

The previous prime is 216157693. The next prime is 216157717. The reversal of 216157716 is 617751612.

216157716 is a `hidden beast` number, since 21 + 61 + 577 + 1 + 6 = 666.

216157716 is digitally balanced in base 3, 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 (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216157717) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34515 + ... + 40293.

Almost surely, 2^216157716 is an apocalyptic number.

It is an amenable number.

216157716 is an abundant number, since it is smaller than the sum of its proper divisors (330861484).

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

216157716 is a wasteful number, since it uses less digits than its factorization.

216157716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6828 (or 6823 counting only the distinct ones).

The product of its digits is 17640, while the sum is 36.

The square root of 216157716 is about 14702.3030848912. The cubic root of 216157716 is about 600.1459978049.

The spelling of 216157716 in words is "two hundred sixteen million, one hundred fifty-seven thousand, seven hundred sixteen".