231587 has 4 divisors (see below), whose sum is σ = 241680. Its totient is φ = 221496.

The previous prime is 231571. The next prime is 231589. The reversal of 231587 is 785132.

231587 is nontrivially palindromic in base 12.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 231587 - 2⁴ = 231571 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 231587.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5012 + ... + 5057.

It is an arithmetic number, because the mean of its divisors is an integer number (60420).

2²³¹⁵⁸⁷ is an apocalyptic number.

231587 is a deficient number, since it is larger than the sum of its proper divisors (10093).

231587 is a wasteful number, since it uses less digits than its factorization.

231587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10092.

The product of its digits is 1680, while the sum is 26.

The square root of 231587 is about 481.2348698920. The cubic root of 231587 is about 61.4098531652.

It can be divided in two parts, 231 and 587, that added together give a palindrome (818).

The spelling of 231587 in words is "two hundred thirty-one thousand, five hundred eighty-seven".