231531503114421 has 24 divisors (see below), whose sum is σ = 335060933975040. Its totient is φ = 154065177079200.

The previous prime is 231531503114399. The next prime is 231531503114441. The reversal of 231531503114421 is 124411305135132.

231531503114421 is a `hidden beast` number, since 2 + 3 + 1 + 5 + 3 + 1 + 503 + 1 + 144 + 2 + 1 = 666.

It is not a de Polignac number, because 231531503114421 - 2²⁷ = 231531368896693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231531503114441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 201583356 + ... + 202728666.

It is an arithmetic number, because the mean of its divisors is an integer number (13960872248960).

Almost surely, 2^{231531503114421} is an apocalyptic number.

It is an amenable number.

231531503114421 is a deficient number, since it is larger than the sum of its proper divisors (103529430860619).

231531503114421 is a wasteful number, since it uses less digits than its factorization.

231531503114421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187377 (or 1187374 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

Adding to 231531503114421 its reverse (124411305135132), we get a palindrome (355942808249553).

The spelling of 231531503114421 in words is "two hundred thirty-one trillion, five hundred thirty-one billion, five hundred three million, one hundred fourteen thousand, four hundred twenty-one".