23171661736243 has 4 divisors (see below), whose sum is σ = 23199816854608. Its totient is φ = 23143506617880.

The previous prime is 23171661736189. The next prime is 23171661736313. The reversal of 23171661736243 is 34263716617132.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23171661736243 is a prime.

It is a super-2 number, since 2×23171661736243² (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 (23171661766243) 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, 14077557948 + ... + 14077559593.

It is an arithmetic number, because the mean of its divisors is an integer number (5799954213652).

Almost surely, 2^{23171661736243} is an apocalyptic number.

23171661736243 is a deficient number, since it is larger than the sum of its proper divisors (28155118365).

23171661736243 is an equidigital number, since it uses as much as digits as its factorization.

23171661736243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28155118364.

The product of its digits is 4572288, while the sum is 52.

The spelling of 23171661736243 in words is "twenty-three trillion, one hundred seventy-one billion, six hundred sixty-one million, seven hundred thirty-six thousand, two hundred forty-three".