2163523534523 has 4 divisors (see below), whose sum is σ = 2329948421808.
Its totient is φ = 1997098647240.
The previous prime is 2163523534511. The next prime is 2163523534621. The reversal of 2163523534523 is 3254353253612.
It is a happy number.
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 2163523534523 - 24 = 2163523534507 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (2163523564523) 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, 83212443623 + ... + 83212443648.
It is an arithmetic number, because the mean of its divisors is an integer number (582487105452).
Almost surely, 22163523534523 is an apocalyptic number.
2163523534523 is a deficient number, since it is larger than the sum of its proper divisors (166424887285).
2163523534523 is a wasteful number, since it uses less digits than its factorization.
2163523534523 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 166424887284.
The product of its digits is 1944000, while the sum is 44.
The spelling of 2163523534523 in words is "two trillion, one hundred sixty-three billion, five hundred twenty-three million, five hundred thirty-four thousand, five hundred twenty-three".