31031012013 has 8 divisors (see below), whose sum is σ = 42801396000. Its totient is φ = 19973984688.

The previous prime is 31031012009. The next prime is 31031012039. The reversal of 31031012013 is 31021013013.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31031012013 - 2² = 31031012009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31031011983 and 31031012001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31031012083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178339063 + ... + 178339236.

It is an arithmetic number, because the mean of its divisors is an integer number (5350174500).

Almost surely, 2^31031012013 is an apocalyptic number.

It is an amenable number.

31031012013 is a deficient number, since it is larger than the sum of its proper divisors (11770383987).

31031012013 is a wasteful number, since it uses less digits than its factorization.

31031012013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356678331.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 31031012013 its reverse (31021013013), we get a palindrome (62052025026).

The spelling of 31031012013 in words is "thirty-one billion, thirty-one million, twelve thousand, thirteen".