23311123031 has 4 divisors (see below), whose sum is σ = 26641283472. Its totient is φ = 19980962592.

The previous prime is 23311123007. The next prime is 23311123037. The reversal of 23311123031 is 13032111332.

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 23311123031 - 2²² = 23306928727 is a prime.

It is a super-2 number, since 2×23311123031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23311122994 and 23311123012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23311123037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1665080210 + ... + 1665080223.

It is an arithmetic number, because the mean of its divisors is an integer number (6660320868).

Almost surely, 2^23311123031 is an apocalyptic number.

23311123031 is a deficient number, since it is larger than the sum of its proper divisors (3330160441).

23311123031 is an equidigital number, since it uses as much as digits as its factorization.

23311123031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3330160440.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 23311123031 its reverse (13032111332), we get a palindrome (36343234363).

The spelling of 23311123031 in words is "twenty-three billion, three hundred eleven million, one hundred twenty-three thousand, thirty-one".