231534531520031 has 2 divisors, whose sum is σ = 231534531520032. Its totient is φ = 231534531520030.

The previous prime is 231534531520021. The next prime is 231534531520141. The reversal of 231534531520031 is 130025135435132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231534531520031 - 2³⁴ = 231517351650847 is a prime.

It is a super-2 number, since 2×231534531520031² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231534531520021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115767265760015 + 115767265760016.

It is an arithmetic number, because the mean of its divisors is an integer number (115767265760016).

Almost surely, 2^{231534531520031} is an apocalyptic number.

231534531520031 is a deficient number, since it is larger than the sum of its proper divisors (1).

231534531520031 is an equidigital number, since it uses as much as digits as its factorization.

231534531520031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162000, while the sum is 38.

Adding to 231534531520031 its reverse (130025135435132), we get a palindrome (361559666955163).

The spelling of 231534531520031 in words is "two hundred thirty-one trillion, five hundred thirty-four billion, five hundred thirty-one million, five hundred twenty thousand, thirty-one".