23131031411 has 4 divisors (see below), whose sum is σ = 23131600800. Its totient is φ = 23130462024.

The previous prime is 23131031383. The next prime is 23131031449. The reversal of 23131031411 is 11413013132.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23131031411 is a prime.

It is a super-2 number, since 2×23131031411² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23131031311) 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, 218651 + ... + 306708.

It is an arithmetic number, because the mean of its divisors is an integer number (5782900200).

Almost surely, 2^23131031411 is an apocalyptic number.

23131031411 is a deficient number, since it is larger than the sum of its proper divisors (569389).

23131031411 is an equidigital number, since it uses as much as digits as its factorization.

23131031411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569388.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 23131031411 its reverse (11413013132), we get a palindrome (34544044543).

The spelling of 23131031411 in words is "twenty-three billion, one hundred thirty-one million, thirty-one thousand, four hundred eleven".