31320434013 has 16 divisors (see below), whose sum is σ = 45576634176. Its totient is φ = 18973898240.

The previous prime is 31320434009. The next prime is 31320434053. The reversal of 31320434013 is 31043402313.

It is not a de Polignac number, because 31320434013 - 2² = 31320434009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31320434053) 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, 126420 + ... + 280397.

It is an arithmetic number, because the mean of its divisors is an integer number (2848539636).

Almost surely, 2^31320434013 is an apocalyptic number.

31320434013 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

31320434013 is a deficient number, since it is larger than the sum of its proper divisors (14256200163).

31320434013 is a wasteful number, since it uses less digits than its factorization.

31320434013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409164.

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 31320434013 its reverse (31043402313), we get a palindrome (62363836326).

The spelling of 31320434013 in words is "thirty-one billion, three hundred twenty million, four hundred thirty-four thousand, thirteen".