231188 has 12 divisors (see below), whose sum is σ = 418740. Its totient is φ = 111552.

The previous prime is 231169. The next prime is 231197. The reversal of 231188 is 881132.

231188 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 145924 + 85264 = 382^2 + 292^2 .

It is a super-3 number, since 3×231188³ = 37069533312110016, which contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 881 + ... + 1112.

It is an arithmetic number, because the mean of its divisors is an integer number (34895).

2²³¹¹⁸⁸ is an apocalyptic number.

It is an amenable number.

231188 is a deficient number, since it is larger than the sum of its proper divisors (187552).

231188 is a wasteful number, since it uses less digits than its factorization.

231188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2026 (or 2024 counting only the distinct ones).

The product of its digits is 384, while the sum is 23.

The square root of 231188 is about 480.8201326900. The cubic root of 231188 is about 61.3745653228.

The spelling of 231188 in words is "two hundred thirty-one thousand, one hundred eighty-eight".