31243302013 has 16 divisors (see below), whose sum is σ = 38989503360. Its totient is φ = 24322420800.

The previous prime is 31243302001. The next prime is 31243302031. The reversal of 31243302013 is 31020334213.

It is a cyclic number.

It is not a de Polignac number, because 31243302013 - 2³³ = 22653367421 is a prime.

It is a super-2 number, since 2×31243302013² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31243302113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109518 + ... + 272911.

It is an arithmetic number, because the mean of its divisors is an integer number (2436843960).

Almost surely, 2^31243302013 is an apocalyptic number.

It is an amenable number.

31243302013 is a deficient number, since it is larger than the sum of its proper divisors (7746201347).

31243302013 is a wasteful number, since it uses less digits than its factorization.

31243302013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383508.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 31243302013 its reverse (31020334213), we get a palindrome (62263636226).

The spelling of 31243302013 in words is "thirty-one billion, two hundred forty-three million, three hundred two thousand, thirteen".