231312032004 has 12 divisors (see below), whose sum is σ = 539728074704. Its totient is φ = 77104010664.

The previous prime is 231312031967. The next prime is 231312032087. The reversal of 231312032004 is 400230213132.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×231312032004² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9638001322 + ... + 9638001345.

Almost surely, 2^231312032004 is an apocalyptic number.

It is an amenable number.

231312032004 is an abundant number, since it is smaller than the sum of its proper divisors (308416042700).

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

231312032004 is a wasteful number, since it uses less digits than its factorization.

231312032004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19276002674 (or 19276002672 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 231312032004 its reverse (400230213132), we get a palindrome (631542245136).

The spelling of 231312032004 in words is "two hundred thirty-one billion, three hundred twelve million, thirty-two thousand, four".