231189 has 16 divisors (see below), whose sum is σ = 359040. Its totient is φ = 129600.

The previous prime is 231169. The next prime is 231197. The reversal of 231189 is 981132.

231189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 231189 - 2⁸ = 230933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2067 + ... + 2175.

It is an arithmetic number, because the mean of its divisors is an integer number (22440).

2²³¹¹⁸⁹ is an apocalyptic number.

It is an amenable number.

231189 is a deficient number, since it is larger than the sum of its proper divisors (127851).

231189 is a wasteful number, since it uses less digits than its factorization.

231189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220.

The product of its digits is 432, while the sum is 24.

The square root of 231189 is about 480.8211725787. The cubic root of 231189 is about 61.3746538143.

The spelling of 231189 in words is "two hundred thirty-one thousand, one hundred eighty-nine".