231220423404 has 72 divisors (see below), whose sum is σ = 589136419872. Its totient is φ = 76461073920.

The previous prime is 231220423397. The next prime is 231220423417. The reversal of 231220423404 is 404324022132.

231220423404 is a `hidden beast` number, since 2 + 31 + 2 + 204 + 23 + 404 = 666.

It is a super-3 number, since 3×231220423404³ (a number of 35 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2231122 + ... + 2332454.

It is an arithmetic number, because the mean of its divisors is an integer number (8182450276).

Almost surely, 2^231220423404 is an apocalyptic number.

It is an amenable number.

231220423404 is an abundant number, since it is smaller than the sum of its proper divisors (357915996468).

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

231220423404 is a wasteful number, since it uses less digits than its factorization.

231220423404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101847 (or 101842 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 231220423404 its reverse (404324022132), we get a palindrome (635544445536).

The spelling of 231220423404 in words is "two hundred thirty-one billion, two hundred twenty million, four hundred twenty-three thousand, four hundred four".