231031004 has 12 divisors (see below), whose sum is σ = 406564200. Its totient is φ = 114869808.

The previous prime is 231030983. The next prime is 231031007. The reversal of 231031004 is 400130132.

It is a self number, because there is not a number n which added to its sum of digits gives 231031004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231031007) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 160619 + ... + 162050.

It is an arithmetic number, because the mean of its divisors is an integer number (33880350).

Almost surely, 2^231031004 is an apocalyptic number.

It is an amenable number.

231031004 is a deficient number, since it is larger than the sum of its proper divisors (175533196).

231031004 is a wasteful number, since it uses less digits than its factorization.

231031004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322852 (or 322850 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 231031004 is about 15199.7040760667. The cubic root of 231031004 is about 613.6066935475.

Adding to 231031004 its reverse (400130132), we get a palindrome (631161136).

The spelling of 231031004 in words is "two hundred thirty-one million, thirty-one thousand, four".