231886 has 12 divisors (see below), whose sum is σ = 368136. Its totient is φ = 109340.

The previous prime is 231877. The next prime is 231893. The reversal of 231886 is 688132.

It is a super-2 number, since 2×231886² = 107542233992, which contains 22 as substring.

Its product of digits (2304) is a multiple of the sum of its prime divisors (96).

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

231886 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3231 + ... + 3301.

It is an arithmetic number, because the mean of its divisors is an integer number (30678).

2²³¹⁸⁸⁶ is an apocalyptic number.

231886 is a deficient number, since it is larger than the sum of its proper divisors (136250).

231886 is an equidigital number, since it uses as much as digits as its factorization.

231886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 96 counting only the distinct ones).

The product of its digits is 2304, while the sum is 28.

The square root of 231886 is about 481.5454288019. The cubic root of 231886 is about 61.4362703786.

It can be divided in two parts, 23188 and 6, that multiplied together give a triangular number (139128 = T₅₂₇).

The spelling of 231886 in words is "two hundred thirty-one thousand, eight hundred eighty-six".