231942018 has 32 divisors (see below), whose sum is σ = 578350080. Its totient is φ = 60244560.

The previous prime is 231941981. The next prime is 231942049. The reversal of 231942018 is 810249132.

231942018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 250558 + ... + 251481.

It is an arithmetic number, because the mean of its divisors is an integer number (18073440).

Almost surely, 2^231942018 is an apocalyptic number.

231942018 is an abundant number, since it is smaller than the sum of its proper divisors (346408062).

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

231942018 is a wasteful number, since it uses less digits than its factorization.

231942018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502062.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 231942018 is about 15229.6427403928. The cubic root of 231942018 is about 614.4121714830.

It can be divided in two parts, 231 and 942018, that added together give a palindrome (942249).

The spelling of 231942018 in words is "two hundred thirty-one million, nine hundred forty-two thousand, eighteen".