23543166134531 has 4 divisors (see below), whose sum is σ = 23543209608864. Its totient is φ = 23543122660200.

The previous prime is 23543166134513. The next prime is 23543166134591. The reversal of 23543166134531 is 13543166134532.

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 23543166134531 - 2²² = 23543161940227 is a prime.

It is a super-2 number, since 2×23543166134531² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23543166134591) 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, 20914475 + ... + 22011396.

It is an arithmetic number, because the mean of its divisors is an integer number (5885802402216).

Almost surely, 2^{23543166134531} is an apocalyptic number.

23543166134531 is a deficient number, since it is larger than the sum of its proper divisors (43474333).

23543166134531 is an equidigital number, since it uses as much as digits as its factorization.

23543166134531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43474332.

The product of its digits is 2332800, while the sum is 47.

Subtracting from 23543166134531 its reverse (13543166134532), we obtain a palindrome (9999999999999).

The spelling of 23543166134531 in words is "twenty-three trillion, five hundred forty-three billion, one hundred sixty-six million, one hundred thirty-four thousand, five hundred thirty-one".