231111032004 has 96 divisors (see below), whose sum is σ = 608000718080. Its totient is φ = 75904646400.

The previous prime is 231111031993. The next prime is 231111032093. The reversal of 231111032004 is 400230111132.

231111032004 is a `hidden beast` number, since 231 + 1 + 110 + 320 + 0 + 4 = 666.

It is a super-2 number, since 2×231111032004² (a number of 24 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8035209 + ... + 8063919.

Almost surely, 2^231111032004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231111032004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (304000359040).

231111032004 is an abundant number, since it is smaller than the sum of its proper divisors (376889686076).

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

231111032004 is a wasteful number, since it uses less digits than its factorization.

231111032004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29818 (or 29810 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 231111032004 its reverse (400230111132), we get a palindrome (631341143136).

The spelling of 231111032004 in words is "two hundred thirty-one billion, one hundred eleven million, thirty-two thousand, four".