13031322013 has 4 divisors (see below), whose sum is σ = 13118780700. Its totient is φ = 12943863328.

The previous prime is 13031321983. The next prime is 13031322019. The reversal of 13031322013 is 31022313031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1168409124 + 11862912889 = 34182^2 + 108917^2 .

It is a cyclic number.

It is not a de Polignac number, because 13031322013 - 2³³ = 4441387421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13031322019) 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, 43729120 + ... + 43729417.

It is an arithmetic number, because the mean of its divisors is an integer number (3279695175).

Almost surely, 2^13031322013 is an apocalyptic number.

It is an amenable number.

13031322013 is a deficient number, since it is larger than the sum of its proper divisors (87458687).

13031322013 is an equidigital number, since it uses as much as digits as its factorization.

13031322013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87458686.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 13031322013 its reverse (31022313031), we get a palindrome (44053635044).

The spelling of 13031322013 in words is "thirteen billion, thirty-one million, three hundred twenty-two thousand, thirteen".