231314442091 has 2 divisors, whose sum is σ = 231314442092. Its totient is φ = 231314442090.

The previous prime is 231314442089. The next prime is 231314442193. The reversal of 231314442091 is 190244413132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231314442091 - 2¹ = 231314442089 is a prime.

It is a super-2 number, since 2×231314442091² (a number of 24 digits) contains 22 as substring.

Together with 231314442089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (231314443091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115657221045 + 115657221046.

It is an arithmetic number, because the mean of its divisors is an integer number (115657221046).

Almost surely, 2^231314442091 is an apocalyptic number.

231314442091 is a deficient number, since it is larger than the sum of its proper divisors (1).

231314442091 is an equidigital number, since it uses as much as digits as its factorization.

231314442091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 34.

The spelling of 231314442091 in words is "two hundred thirty-one billion, three hundred fourteen million, four hundred forty-two thousand, ninety-one".