216614916 has 72 divisors (see below), whose sum is σ = 639125760. Its totient is φ = 60569856.

The previous prime is 216614903. The next prime is 216614917. The reversal of 216614916 is 619416612.

216614916 is a `hidden beast` number, since 2 + 166 + 1 + 491 + 6 = 666.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216614917) 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, 2700 + ... + 20988.

Almost surely, 2^216614916 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 216614916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319562880).

216614916 is an abundant number, since it is smaller than the sum of its proper divisors (422510844).

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

216614916 is a wasteful number, since it uses less digits than its factorization.

216614916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18353 (or 18348 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 216614916 is about 14717.8434561589. The cubic root of 216614916 is about 600.5688272222.

The spelling of 216614916 in words is "two hundred sixteen million, six hundred fourteen thousand, nine hundred sixteen".