231136026944891 has 2 divisors, whose sum is σ = 231136026944892. Its totient is φ = 231136026944890.

The previous prime is 231136026944701. The next prime is 231136026944909. The reversal of 231136026944891 is 198449620631132.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231136026944891 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231136026944891.

It is not a weakly prime, because it can be changed into another prime (231136026943891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115568013472445 + 115568013472446.

It is an arithmetic number, because the mean of its divisors is an integer number (115568013472446).

Almost surely, 2^{231136026944891} is an apocalyptic number.

231136026944891 is a deficient number, since it is larger than the sum of its proper divisors (1).

231136026944891 is an equidigital number, since it uses as much as digits as its factorization.

231136026944891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13436928, while the sum is 59.

The spelling of 231136026944891 in words is "two hundred thirty-one trillion, one hundred thirty-six billion, twenty-six million, nine hundred forty-four thousand, eight hundred ninety-one".