31112302013 has 4 divisors (see below), whose sum is σ = 33505556028. Its totient is φ = 28719048000.

The previous prime is 31112301991. The next prime is 31112302019. The reversal of 31112302013 is 31020321113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31020321113 = 397 ⋅78136829.

It can be written as a sum of positive squares in 2 ways, for example, as 4203836569 + 26908465444 = 64837^2 + 164038^2 .

It is a cyclic number.

It is not a de Polignac number, because 31112302013 - 2³² = 26817334717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31112301982 and 31112302000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31112302019) 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, 1196626988 + ... + 1196627013.

It is an arithmetic number, because the mean of its divisors is an integer number (8376389007).

Almost surely, 2^31112302013 is an apocalyptic number.

It is an amenable number.

31112302013 is a deficient number, since it is larger than the sum of its proper divisors (2393254015).

31112302013 is a wasteful number, since it uses less digits than its factorization.

31112302013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2393254014.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31112302013 its reverse (31020321113), we get a palindrome (62132623126).

The spelling of 31112302013 in words is "thirty-one billion, one hundred twelve million, three hundred two thousand, thirteen".