31231320023004 has 12 divisors (see below), whose sum is σ = 72873080053704. Its totient is φ = 10410440007664.

The previous prime is 31231320022949. The next prime is 31231320023009. The reversal of 31231320023004 is 40032002313213.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31231320023009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1301305000947 + ... + 1301305000970.

It is an arithmetic number, because the mean of its divisors is an integer number (6072756671142).

Almost surely, 2^{31231320023004} is an apocalyptic number.

It is an amenable number.

31231320023004 is an abundant number, since it is smaller than the sum of its proper divisors (41641760030700).

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

31231320023004 is a wasteful number, since it uses less digits than its factorization.

31231320023004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2602610001924 (or 2602610001922 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 31231320023004 its reverse (40032002313213), we get a palindrome (71263322336217).

The spelling of 31231320023004 in words is "thirty-one trillion, two hundred thirty-one billion, three hundred twenty million, twenty-three thousand, four".