23031311311 has 4 divisors (see below), whose sum is σ = 23032808824. Its totient is φ = 23029813800.

The previous prime is 23031311309. The next prime is 23031311327. The reversal of 23031311311 is 11311313032.

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 23031311311 - 2¹ = 23031311309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23031311351) 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, 725445 + ... + 756526.

It is an arithmetic number, because the mean of its divisors is an integer number (5758202206).

Almost surely, 2^23031311311 is an apocalyptic number.

23031311311 is a deficient number, since it is larger than the sum of its proper divisors (1497513).

23031311311 is a wasteful number, since it uses less digits than its factorization.

23031311311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1497512.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 23031311311 its reverse (11311313032), we get a palindrome (34342624343).

The spelling of 23031311311 in words is "twenty-three billion, thirty-one million, three hundred eleven thousand, three hundred eleven".