231241133491 has 2 divisors, whose sum is σ = 231241133492. Its totient is φ = 231241133490.

The previous prime is 231241133399. The next prime is 231241133509. The reversal of 231241133491 is 194331142132.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231241133491 is a prime.

It is not a weakly prime, because it can be changed into another prime (231241131491) 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, 115620566745 + 115620566746.

It is an arithmetic number, because the mean of its divisors is an integer number (115620566746).

Almost surely, 2^231241133491 is an apocalyptic number.

231241133491 is a deficient number, since it is larger than the sum of its proper divisors (1).

231241133491 is an equidigital number, since it uses as much as digits as its factorization.

231241133491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 34.

The spelling of 231241133491 in words is "two hundred thirty-one billion, two hundred forty-one million, one hundred thirty-three thousand, four hundred ninety-one".