31031010132013 has 4 divisors (see below), whose sum is σ = 31188527950140. Its totient is φ = 30873492313888.

The previous prime is 31031010132011. The next prime is 31031010132047. The reversal of 31031010132013 is 31023101013013.

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 26534222695044 + 4496787436969 = 5151138^2 + 2120563^2 .

It is a cyclic number.

It is not a de Polignac number, because 31031010132013 - 2¹ = 31031010132011 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 (31031010132011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78758908768 + ... + 78758909161.

It is an arithmetic number, because the mean of its divisors is an integer number (7797131987535).

Almost surely, 2^{31031010132013} is an apocalyptic number.

It is an amenable number.

31031010132013 is a deficient number, since it is larger than the sum of its proper divisors (157517818127).

31031010132013 is a wasteful number, since it uses less digits than its factorization.

31031010132013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157517818126.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 31031010132013 its reverse (31023101013013), we get a palindrome (62054111145026).

The spelling of 31031010132013 in words is "thirty-one trillion, thirty-one billion, ten million, one hundred thirty-two thousand, thirteen".