231118 has 8 divisors (see below), whose sum is σ = 351648. Its totient is φ = 113904.

The previous prime is 231109. The next prime is 231131. The reversal of 231118 is 811132.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 646 + ... + 937.

It is an arithmetic number, because the mean of its divisors is an integer number (43956).

2²³¹¹¹⁸ is an apocalyptic number.

231118 is a deficient number, since it is larger than the sum of its proper divisors (120530).

231118 is a wasteful number, since it uses less digits than its factorization.

231118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658.

The product of its digits is 48, while the sum is 16.

The square root of 231118 is about 480.7473348860. The cubic root of 231118 is about 61.3683702878.

The spelling of 231118 in words is "two hundred thirty-one thousand, one hundred eighteen".