23131021323 has 4 divisors (see below), whose sum is σ = 30841361768. Its totient is φ = 15420680880.

The previous prime is 23131021297. The next prime is 23131021351. The reversal of 23131021323 is 32312013132.

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

It is not a de Polignac number, because 23131021323 - 2³⁰ = 22057279499 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23131021323.

It is not an unprimeable number, because it can be changed into a prime (23131020323) 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, 3855170218 + ... + 3855170223.

It is an arithmetic number, because the mean of its divisors is an integer number (7710340442).

Almost surely, 2^23131021323 is an apocalyptic number.

23131021323 is a deficient number, since it is larger than the sum of its proper divisors (7710340445).

23131021323 is an equidigital number, since it uses as much as digits as its factorization.

23131021323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7710340444.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 23131021323 its reverse (32312013132), we get a palindrome (55443034455).

The spelling of 23131021323 in words is "twenty-three billion, one hundred thirty-one million, twenty-one thousand, three hundred twenty-three".