231422242091 has 2 divisors, whose sum is σ = 231422242092. Its totient is φ = 231422242090.

The previous prime is 231422242087. The next prime is 231422242109. The reversal of 231422242091 is 190242224132.

Together with next prime (231422242109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231422242091 - 2² = 231422242087 is a prime.

It is not a weakly prime, because it can be changed into another prime (231422242031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115711121045 + 115711121046.

It is an arithmetic number, because the mean of its divisors is an integer number (115711121046).

Almost surely, 2^231422242091 is an apocalyptic number.

231422242091 is a deficient number, since it is larger than the sum of its proper divisors (1).

231422242091 is an equidigital number, since it uses as much as digits as its factorization.

231422242091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 32.

The spelling of 231422242091 in words is "two hundred thirty-one billion, four hundred twenty-two million, two hundred forty-two thousand, ninety-one".