231805233431 has 2 divisors, whose sum is σ = 231805233432. Its totient is φ = 231805233430.

The previous prime is 231805233391. The next prime is 231805233509. The reversal of 231805233431 is 134332508132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231805233431 - 2²⁶ = 231738124567 is a prime.

It is a super-2 number, since 2×231805233431² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 231805233391 and 231805233400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231805232431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115902616715 + 115902616716.

It is an arithmetic number, because the mean of its divisors is an integer number (115902616716).

Almost surely, 2^231805233431 is an apocalyptic number.

231805233431 is a deficient number, since it is larger than the sum of its proper divisors (1).

231805233431 is an equidigital number, since it uses as much as digits as its factorization.

231805233431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 231805233431 in words is "two hundred thirty-one billion, eight hundred five million, two hundred thirty-three thousand, four hundred thirty-one".