31280204039 has 12 divisors (see below), whose sum is σ = 36930272184. Its totient is φ = 26411427504.

The previous prime is 31280204029. The next prime is 31280204047. The reversal of 31280204039 is 93040208213.

It is a happy number.

It is not a de Polignac number, because 31280204039 - 2⁸ = 31280203783 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31280203996 and 31280204014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31280204029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4760684 + ... + 4767249.

It is an arithmetic number, because the mean of its divisors is an integer number (3077522682).

Almost surely, 2^31280204039 is an apocalyptic number.

31280204039 is a deficient number, since it is larger than the sum of its proper divisors (5650068145).

31280204039 is an equidigital number, since it uses as much as digits as its factorization.

31280204039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9528014 (or 9528007 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The spelling of 31280204039 in words is "thirty-one billion, two hundred eighty million, two hundred four thousand, thirty-nine".