581609131 has 2 divisors, whose sum is σ = 581609132. Its totient is φ = 581609130.

The previous prime is 581609113. The next prime is 581609153. The reversal of 581609131 is 131906185.

581609131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (581609113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 581609131 - 2¹³ = 581600939 is a prime.

It is a super-3 number, since 3×581609131³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (581601131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 290804565 + 290804566.

It is an arithmetic number, because the mean of its divisors is an integer number (290804566).

Almost surely, 2^581609131 is an apocalyptic number.

581609131 is a deficient number, since it is larger than the sum of its proper divisors (1).

581609131 is an equidigital number, since it uses as much as digits as its factorization.

581609131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 581609131 is about 24116.5737823597. The cubic root of 581609131 is about 834.7256110155.

The spelling of 581609131 in words is "five hundred eighty-one million, six hundred nine thousand, one hundred thirty-one".