23313021231 has 4 divisors (see below), whose sum is σ = 31084028312. Its totient is φ = 15542014152.

The previous prime is 23313021197. The next prime is 23313021239. The reversal of 23313021231 is 13212031332.

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

It is not a de Polignac number, because 23313021231 - 2⁶ = 23313021167 is a prime.

It is a super-2 number, since 2×23313021231² (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 = 23313021198 and 23313021207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23313021239) 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, 3885503536 + ... + 3885503541.

It is an arithmetic number, because the mean of its divisors is an integer number (7771007078).

Almost surely, 2^23313021231 is an apocalyptic number.

23313021231 is a deficient number, since it is larger than the sum of its proper divisors (7771007081).

23313021231 is an equidigital number, since it uses as much as digits as its factorization.

23313021231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7771007080.

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

Adding to 23313021231 its reverse (13212031332), we get a palindrome (36525052563).

The spelling of 23313021231 in words is "twenty-three billion, three hundred thirteen million, twenty-one thousand, two hundred thirty-one".