216614691 has 6 divisors (see below), whose sum is σ = 312887900. Its totient is φ = 144409788.

The previous prime is 216614689. The next prime is 216614711. The reversal of 216614691 is 196416612.

216614691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216614691 - 2¹ = 216614689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216614641) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12034141 + ... + 12034158.

Almost surely, 2^216614691 is an apocalyptic number.

216614691 is a deficient number, since it is larger than the sum of its proper divisors (96273209).

216614691 is a wasteful number, since it uses less digits than its factorization.

216614691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24068305 (or 24068302 counting only the distinct ones).

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

The square root of 216614691 is about 14717.8358123740. The cubic root of 216614691 is about 600.5686192833.

The spelling of 216614691 in words is "two hundred sixteen million, six hundred fourteen thousand, six hundred ninety-one".