231858 has 24 divisors (see below), whose sum is σ = 548496. Its totient is φ = 70200.

The previous prime is 231841. The next prime is 231859. The reversal of 231858 is 858132.

It is a happy number.

231858 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (231859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 388 + ... + 783.

It is an arithmetic number, because the mean of its divisors is an integer number (22854).

2²³¹⁸⁵⁸ is an apocalyptic number.

231858 is an abundant number, since it is smaller than the sum of its proper divisors (316638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231858 is a wasteful number, since it uses less digits than its factorization.

231858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190 (or 1187 counting only the distinct ones).

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

The square root of 231858 is about 481.5163548624. The cubic root of 231858 is about 61.4337974899.

It can be divided in two parts, 231 and 858, that added together give a square (1089 = 33²).

The spelling of 231858 in words is "two hundred thirty-one thousand, eight hundred fifty-eight".