216524216423 has 4 divisors (see below), whose sum is σ = 218668020648. Its totient is φ = 214380412200.

The previous prime is 216524216401. The next prime is 216524216437. The reversal of 216524216423 is 324612425612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 216524216423 - 2³⁰ = 215450474599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216524216483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1071901961 + ... + 1071902162.

It is an arithmetic number, because the mean of its divisors is an integer number (54667005162).

Almost surely, 2^216524216423 is an apocalyptic number.

216524216423 is a deficient number, since it is larger than the sum of its proper divisors (2143804225).

216524216423 is a wasteful number, since it uses less digits than its factorization.

216524216423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2143804224.

The product of its digits is 138240, while the sum is 38.

The spelling of 216524216423 in words is "two hundred sixteen billion, five hundred twenty-four million, two hundred sixteen thousand, four hundred twenty-three".