231531421254047 has 2 divisors, whose sum is σ = 231531421254048. Its totient is φ = 231531421254046.

The previous prime is 231531421254041. The next prime is 231531421254097. The reversal of 231531421254047 is 740452124135132.

231531421254047 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231531421254047 - 2¹⁰ = 231531421253023 is a prime.

It is a super-2 number, since 2×231531421254047² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231531421253989 and 231531421254007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231531421254041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115765710627023 + 115765710627024.

It is an arithmetic number, because the mean of its divisors is an integer number (115765710627024).

Almost surely, 2^{231531421254047} is an apocalyptic number.

231531421254047 is a deficient number, since it is larger than the sum of its proper divisors (1).

231531421254047 is an equidigital number, since it uses as much as digits as its factorization.

231531421254047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 806400, while the sum is 44.

Adding to 231531421254047 its reverse (740452124135132), we get a palindrome (971983545389179).

The spelling of 231531421254047 in words is "two hundred thirty-one trillion, five hundred thirty-one billion, four hundred twenty-one million, two hundred fifty-four thousand, forty-seven".