31311200322013 has 4 divisors (see below), whose sum is σ = 31357043954208. Its totient is φ = 31265356689820.

The previous prime is 31311200321941. The next prime is 31311200322029. The reversal of 31311200322013 is 31022300211313.

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.

It is a cyclic number.

It is not a de Polignac number, because 31311200322013 - 2²¹ = 31311198224861 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 (31311200322113) 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, 22921815073 + ... + 22921816438.

It is an arithmetic number, because the mean of its divisors is an integer number (7839260988552).

Almost surely, 2^{31311200322013} is an apocalyptic number.

It is an amenable number.

31311200322013 is a deficient number, since it is larger than the sum of its proper divisors (45843632195).

31311200322013 is an equidigital number, since it uses as much as digits as its factorization.

31311200322013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45843632194.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31311200322013 its reverse (31022300211313), we get a palindrome (62333500533326).

The spelling of 31311200322013 in words is "thirty-one trillion, three hundred eleven billion, two hundred million, three hundred twenty-two thousand, thirteen".