31200431004040 has 16 divisors (see below), whose sum is σ = 70200969759180. Its totient is φ = 12480172401600.

The previous prime is 31200431004023. The next prime is 31200431004049. The reversal of 31200431004040 is 4040013400213.

It can be written as a sum of positive squares in 2 ways, for example, as 29441714744484 + 1758716259556 = 5426022^2 + 1326166^2 .

It is not an unprimeable number, because it can be changed into a prime (31200431004049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 390005387511 + ... + 390005387590.

Almost surely, 2^{31200431004040} is an apocalyptic number.

It is an amenable number.

31200431004040 is an abundant number, since it is smaller than the sum of its proper divisors (39000538755140).

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

31200431004040 is a wasteful number, since it uses less digits than its factorization.

31200431004040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 780010775112 (or 780010775108 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 31200431004040 its reverse (4040013400213), we get a palindrome (35240444404253).

The spelling of 31200431004040 in words is "thirty-one trillion, two hundred billion, four hundred thirty-one million, four thousand, forty".