231323144004 has 120 divisors (see below), whose sum is σ = 637108385760. Its totient is φ = 72985567104.

The previous prime is 231323143963. The next prime is 231323144027. The reversal of 231323144004 is 400441323132.

231323144004 is a `hidden beast` number, since 23 + 1 + 3 + 231 + 4 + 400 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7291344 + ... + 7323000.

It is an arithmetic number, because the mean of its divisors is an integer number (5309236548).

Almost surely, 2^231323144004 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 231323144004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318554192880).

231323144004 is an abundant number, since it is smaller than the sum of its proper divisors (405785241756).

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

231323144004 is a wasteful number, since it uses less digits than its factorization.

231323144004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32879 (or 32868 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 231323144004 its reverse (400441323132), we get a palindrome (631764467136).

The spelling of 231323144004 in words is "two hundred thirty-one billion, three hundred twenty-three million, one hundred forty-four thousand, four".