231088662191 has 2 divisors, whose sum is σ = 231088662192. Its totient is φ = 231088662190.

The previous prime is 231088662187. The next prime is 231088662239. The reversal of 231088662191 is 191266880132.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231088662191 - 2² = 231088662187 is a prime.

It is a super-2 number, since 2×231088662191² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231088662131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115544331095 + 115544331096.

It is an arithmetic number, because the mean of its divisors is an integer number (115544331096).

Almost surely, 2^231088662191 is an apocalyptic number.

231088662191 is a deficient number, since it is larger than the sum of its proper divisors (1).

231088662191 is an equidigital number, since it uses as much as digits as its factorization.

231088662191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 47.

The spelling of 231088662191 in words is "two hundred thirty-one billion, eighty-eight million, six hundred sixty-two thousand, one hundred ninety-one".