23311021313431 has 4 divisors (see below), whose sum is σ = 23343900046600. Its totient is φ = 23278142580264.

The previous prime is 23311021313429. The next prime is 23311021313441. The reversal of 23311021313431 is 13431312011332.

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 23311021313431 - 2¹ = 23311021313429 is a prime.

It is a super-2 number, since 2×23311021313431² (a number of 28 digits) contains 22 as substring.

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 23311021313431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23311021313401) 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, 16439365521 + ... + 16439366938.

It is an arithmetic number, because the mean of its divisors is an integer number (5835975011650).

Almost surely, 2^{23311021313431} is an apocalyptic number.

23311021313431 is a deficient number, since it is larger than the sum of its proper divisors (32878733169).

23311021313431 is an equidigital number, since it uses as much as digits as its factorization.

23311021313431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32878733168.

The product of its (nonzero) digits is 3888, while the sum is 28.

Adding to 23311021313431 its reverse (13431312011332), we get a palindrome (36742333324763).

The spelling of 23311021313431 in words is "twenty-three trillion, three hundred eleven billion, twenty-one million, three hundred thirteen thousand, four hundred thirty-one".