231021804 has 24 divisors (see below), whose sum is σ = 580516720. Its totient is φ = 71083584.

The previous prime is 231021799. The next prime is 231021851. The reversal of 231021804 is 408120132.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 740299 + ... + 740610.

Almost surely, 2^231021804 is an apocalyptic number.

It is an amenable number.

231021804 is an abundant number, since it is smaller than the sum of its proper divisors (349494916).

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

231021804 is a wasteful number, since it uses less digits than its factorization.

231021804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480929 (or 1480927 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 231021804 is about 15199.4014355829. The cubic root of 231021804 is about 613.5985485274.

Adding to 231021804 its reverse (408120132), we get a palindrome (639141936).

The spelling of 231021804 in words is "two hundred thirty-one million, twenty-one thousand, eight hundred four".