231018 has 16 divisors (see below), whose sum is σ = 467040. Its totient is φ = 76176.

The previous prime is 231017. The next prime is 231019. The reversal of 231018 is 810132.

It is a happy number.

231018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (231017) and next prime (231019).

It is a junction number, because it is equal to n+sod(n) for n = 230988 and 231006.

It is not an unprimeable number, because it can be changed into a prime (231017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 696 + ... + 972.

It is an arithmetic number, because the mean of its divisors is an integer number (29190).

2²³¹⁰¹⁸ is an apocalyptic number.

231018 is an abundant number, since it is smaller than the sum of its proper divisors (236022).

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

231018 is a wasteful number, since it uses less digits than its factorization.

231018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 231018 is about 480.6433188967. The cubic root of 231018 is about 61.3595180675.

The spelling of 231018 in words is "two hundred thirty-one thousand, eighteen".