31068574513 has 4 divisors (see below), whose sum is σ = 31068939328. Its totient is φ = 31068209700.

The previous prime is 31068574487. The next prime is 31068574517. The reversal of 31068574513 is 31547586013.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 31547586013 = 43 ⋅733664791.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31068574513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31068574513.

It is not an unprimeable number, because it can be changed into a prime (31068574517) 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, 20788 + ... + 250138.

It is an arithmetic number, because the mean of its divisors is an integer number (7767234832).

Almost surely, 2^31068574513 is an apocalyptic number.

It is an amenable number.

31068574513 is a deficient number, since it is larger than the sum of its proper divisors (364815).

31068574513 is a wasteful number, since it uses less digits than its factorization.

31068574513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364814.

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 31068574513 in words is "thirty-one billion, sixty-eight million, five hundred seventy-four thousand, five hundred thirteen".