231225405391 has 2 divisors, whose sum is σ = 231225405392. Its totient is φ = 231225405390.

The previous prime is 231225405377. The next prime is 231225405403. The reversal of 231225405391 is 193504522132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231225405391 - 2²⁵ = 231191850959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231225405391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231225405791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115612702695 + 115612702696.

It is an arithmetic number, because the mean of its divisors is an integer number (115612702696).

Almost surely, 2^231225405391 is an apocalyptic number.

231225405391 is a deficient number, since it is larger than the sum of its proper divisors (1).

231225405391 is an equidigital number, since it uses as much as digits as its factorization.

231225405391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 231225405391 in words is "two hundred thirty-one billion, two hundred twenty-five million, four hundred five thousand, three hundred ninety-one".