23131111331 has 2 divisors, whose sum is σ = 23131111332. Its totient is φ = 23131111330.

The previous prime is 23131111307. The next prime is 23131111343. The reversal of 23131111331 is 13311113132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23131111331 - 2¹⁴ = 23131094947 is a prime.

It is a super-2 number, since 2×23131111331² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (23131111361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11565555665 + 11565555666.

It is an arithmetic number, because the mean of its divisors is an integer number (11565555666).

Almost surely, 2^23131111331 is an apocalyptic number.

23131111331 is a deficient number, since it is larger than the sum of its proper divisors (1).

23131111331 is an equidigital number, since it uses as much as digits as its factorization.

23131111331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162, while the sum is 20.

Adding to 23131111331 its reverse (13311113132), we get a palindrome (36442224463).

The spelling of 23131111331 in words is "twenty-three billion, one hundred thirty-one million, one hundred eleven thousand, three hundred thirty-one".