231085579 has 2 divisors, whose sum is σ = 231085580. Its totient is φ = 231085578.

The previous prime is 231085571. The next prime is 231085583. The reversal of 231085579 is 975580132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231085579 - 2³ = 231085571 is a prime.

It is not a weakly prime, because it can be changed into another prime (231085571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115542789 + 115542790.

It is an arithmetic number, because the mean of its divisors is an integer number (115542790).

Almost surely, 2^231085579 is an apocalyptic number.

231085579 is a deficient number, since it is larger than the sum of its proper divisors (1).

231085579 is an equidigital number, since it uses as much as digits as its factorization.

231085579 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 231085579 is about 15201.4992352728. The cubic root of 231085579 is about 613.6550058926.

The spelling of 231085579 in words is "two hundred thirty-one million, eighty-five thousand, five hundred seventy-nine".