31311013013 has 8 divisors (see below), whose sum is σ = 35785604928. Its totient is φ = 26836818624.

The previous prime is 31311012983. The next prime is 31311013021. The reversal of 31311013013 is 31031011313.

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

It is not a de Polignac number, because 31311013013 - 2⁶ = 31311012949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31311012982 and 31311013000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311013073) 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, 94670 + ... + 267552.

It is an arithmetic number, because the mean of its divisors is an integer number (4473200616).

Almost surely, 2^31311013013 is an apocalyptic number.

It is an amenable number.

31311013013 is a deficient number, since it is larger than the sum of its proper divisors (4474591915).

31311013013 is a wasteful number, since it uses less digits than its factorization.

31311013013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198763.

The product of its (nonzero) digits is 81, while the sum is 17.

Adding to 31311013013 its reverse (31031011313), we get a palindrome (62342024326).

The spelling of 31311013013 in words is "thirty-one billion, three hundred eleven million, thirteen thousand, thirteen".