231885 has 12 divisors (see below), whose sum is σ = 402012. Its totient is φ = 123648.

The previous prime is 231877. The next prime is 231893. The reversal of 231885 is 588132.

It is a happy number.

231885 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (231877) and next prime (231893).

It can be written as a sum of positive squares in 2 ways, for example, as 114921 + 116964 = 339^2 + 342^2 .

It is not a de Polignac number, because 231885 - 2³ = 231877 is a prime.

231885 is strictly pandigital in base 7.

231885 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2532 + ... + 2621.

It is an arithmetic number, because the mean of its divisors is an integer number (33501).

2²³¹⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

231885 is a deficient number, since it is larger than the sum of its proper divisors (170127).

231885 is a wasteful number, since it uses less digits than its factorization.

231885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5164 (or 5161 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 231885 is about 481.5443904771. The cubic root of 231885 is about 61.4361820646.

The spelling of 231885 in words is "two hundred thirty-one thousand, eight hundred eighty-five".