231585 has 8 divisors (see below), whose sum is σ = 370560. Its totient is φ = 123504.

The previous prime is 231571. The next prime is 231589. The reversal of 231585 is 585132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231585 - 2¹⁰ = 230561 is a prime.

It is a super-2 number, since 2×231585² = 107263224450, which contains 22 as substring.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 231585.

It is not an unprimeable number, because it can be changed into a prime (231589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7705 + ... + 7734.

It is an arithmetic number, because the mean of its divisors is an integer number (46320).

2²³¹⁵⁸⁵ is an apocalyptic number.

It is an amenable number.

231585 is a deficient number, since it is larger than the sum of its proper divisors (138975).

231585 is a wasteful number, since it uses less digits than its factorization.

231585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15447.

The product of its digits is 1200, while the sum is 24.

The square root of 231585 is about 481.2327919001. The cubic root of 231585 is about 61.4096763849.

The spelling of 231585 in words is "two hundred thirty-one thousand, five hundred eighty-five".