231031242 has 24 divisors (see below), whose sum is σ = 539073444. Its totient is φ = 71086464.

The previous prime is 231031223. The next prime is 231031253. The reversal of 231031242 is 242130132.

231031242 is a `hidden beast` number, since 2 + 310 + 312 + 42 = 666.

231031242 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 226532601 + 4498641 = 15051^2 + 2121^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 493423 + ... + 493890.

Almost surely, 2^231031242 is an apocalyptic number.

231031242 is an abundant number, since it is smaller than the sum of its proper divisors (308042202).

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

231031242 is a wasteful number, since it uses less digits than its factorization.

231031242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987334 (or 987331 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 231031242 is about 15199.7119051645. The cubic root of 231031242 is about 613.6069042528.

Adding to 231031242 its reverse (242130132), we get a palindrome (473161374).

The spelling of 231031242 in words is "two hundred thirty-one million, thirty-one thousand, two hundred forty-two".