231550353420431 has 2 divisors, whose sum is σ = 231550353420432. Its totient is φ = 231550353420430.

The previous prime is 231550353420413. The next prime is 231550353420437. The reversal of 231550353420431 is 134024353055132.

Together with previous prime (231550353420413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231550353420431 - 2²² = 231550349226127 is a prime.

It is a super-2 number, since 2×231550353420431² (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 (231550353420437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115775176710215 + 115775176710216.

It is an arithmetic number, because the mean of its divisors is an integer number (115775176710216).

Almost surely, 2^{231550353420431} is an apocalyptic number.

231550353420431 is a deficient number, since it is larger than the sum of its proper divisors (1).

231550353420431 is an equidigital number, since it uses as much as digits as its factorization.

231550353420431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648000, while the sum is 41.

The spelling of 231550353420431 in words is "two hundred thirty-one trillion, five hundred fifty billion, three hundred fifty-three million, four hundred twenty thousand, four hundred thirty-one".