231541355312791 has 2 divisors, whose sum is σ = 231541355312792. Its totient is φ = 231541355312790.

The previous prime is 231541355312723. The next prime is 231541355312801. The reversal of 231541355312791 is 197213553145132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231541355312791 - 2¹³ = 231541355304599 is a prime.

It is a super-2 number, since 2×231541355312791² (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 (231541155312791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115770677656395 + 115770677656396.

It is an arithmetic number, because the mean of its divisors is an integer number (115770677656396).

Almost surely, 2^{231541355312791} is an apocalyptic number.

231541355312791 is a deficient number, since it is larger than the sum of its proper divisors (1).

231541355312791 is an equidigital number, since it uses as much as digits as its factorization.

231541355312791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3402000, while the sum is 52.

The spelling of 231541355312791 in words is "two hundred thirty-one trillion, five hundred forty-one billion, three hundred fifty-five million, three hundred twelve thousand, seven hundred ninety-one".