23311131223 has 4 divisors (see below), whose sum is σ = 23314631248. Its totient is φ = 23307631200.

The previous prime is 23311131209. The next prime is 23311131227. The reversal of 23311131223 is 32213111332.

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 23311131223 - 2⁵ = 23311131191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23311131194 and 23311131203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23311131227) 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, 1740003 + ... + 1753348.

It is an arithmetic number, because the mean of its divisors is an integer number (5828657812).

Almost surely, 2^23311131223 is an apocalyptic number.

23311131223 is a deficient number, since it is larger than the sum of its proper divisors (3500025).

23311131223 is an equidigital number, since it uses as much as digits as its factorization.

23311131223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3500024.

The product of its digits is 648, while the sum is 22.

Adding to 23311131223 its reverse (32213111332), we get a palindrome (55524242555).

The spelling of 23311131223 in words is "twenty-three billion, three hundred eleven million, one hundred thirty-one thousand, two hundred twenty-three".