31145123425204 has 12 divisors (see below), whose sum is σ = 54506791779300. Its totient is φ = 15571754345408.

The previous prime is 31145123425177. The next prime is 31145123425261. The reversal of 31145123425204 is 40252432154113.

It can be written as a sum of positive squares in 2 ways, for example, as 19566007529104 + 11579115896100 = 4423348^2 + 3402810^2 .

It is a congruent number.

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, 201754999 + ... + 201909310.

It is an arithmetic number, because the mean of its divisors is an integer number (4542232648275).

Almost surely, 2^{31145123425204} is an apocalyptic number.

It is an amenable number.

31145123425204 is a deficient number, since it is larger than the sum of its proper divisors (23361668354096).

31145123425204 is a wasteful number, since it uses less digits than its factorization.

31145123425204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403683602 (or 403683600 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 37.

Adding to 31145123425204 its reverse (40252432154113), we get a palindrome (71397555579317).

The spelling of 31145123425204 in words is "thirty-one trillion, one hundred forty-five billion, one hundred twenty-three million, four hundred twenty-five thousand, two hundred four".