581232056309 has 2 divisors, whose sum is σ = 581232056310. Its totient is φ = 581232056308.

The previous prime is 581232056189. The next prime is 581232056417. The reversal of 581232056309 is 903650232185.

581232056309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 581208016900 + 24039409 = 762370^2 + 4903^2 .

It is a cyclic number.

It is not a de Polignac number, because 581232056309 - 2²⁰ = 581231007733 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 581232056309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (581232050309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 290616028154 + 290616028155.

It is an arithmetic number, because the mean of its divisors is an integer number (290616028155).

Almost surely, 2^581232056309 is an apocalyptic number.

It is an amenable number.

581232056309 is a deficient number, since it is larger than the sum of its proper divisors (1).

581232056309 is an equidigital number, since it uses as much as digits as its factorization.

581232056309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 581232056309 in words is "five hundred eighty-one billion, two hundred thirty-two million, fifty-six thousand, three hundred nine".