216523831735523 has 8 divisors (see below), whose sum is σ = 234046349434800. Its totient is φ = 199125148084128.

The previous prime is 216523831735517. The next prime is 216523831735553. The reversal of 216523831735523 is 325537138325612.

216523831735523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216523831735523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216523831735553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30958508333 + ... + 30958515326.

It is an arithmetic number, because the mean of its divisors is an integer number (29255793679350).

Almost surely, 2^{216523831735523} is an apocalyptic number.

216523831735523 is a deficient number, since it is larger than the sum of its proper divisors (17522517699277).

216523831735523 is a wasteful number, since it uses less digits than its factorization.

216523831735523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61917023941.

The product of its digits is 27216000, while the sum is 56.

The spelling of 216523831735523 in words is "two hundred sixteen trillion, five hundred twenty-three billion, eight hundred thirty-one million, seven hundred thirty-five thousand, five hundred twenty-three".