231090 has 16 divisors (see below), whose sum is σ = 554688. Its totient is φ = 61616.

The previous prime is 231079. The next prime is 231107. The reversal of 231090 is 90132.

231090 is nontrivially palindromic in base 14.

231090 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is an unprimeable number.

231090 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 7 ways as a sum of consecutive naturals, for example, 3822 + ... + 3881.

It is an arithmetic number, because the mean of its divisors is an integer number (34668).

2²³¹⁰⁹⁰ is an apocalyptic number.

231090 is an abundant number, since it is smaller than the sum of its proper divisors (323598).

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

231090 is a wasteful number, since it uses less digits than its factorization.

231090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7713.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 231090 is about 480.7182126777. The cubic root of 231090 is about 61.3658919236.

The spelling of 231090 in words is "two hundred thirty-one thousand, ninety".