31043131013311 has 4 divisors (see below), whose sum is σ = 31047516262800. Its totient is φ = 31038745763824.

The previous prime is 31043131013267. The next prime is 31043131013329. The reversal of 31043131013311 is 11331013134013.

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

It is a cyclic number.

It is not a de Polignac number, because 31043131013311 - 2²⁷ = 31042996795583 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 (31043131013371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2192614126 + ... + 2192628283.

It is an arithmetic number, because the mean of its divisors is an integer number (7761879065700).

Almost surely, 2^{31043131013311} is an apocalyptic number.

31043131013311 is a deficient number, since it is larger than the sum of its proper divisors (4385249489).

31043131013311 is an equidigital number, since it uses as much as digits as its factorization.

31043131013311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4385249488.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 31043131013311 its reverse (11331013134013), we get a palindrome (42374144147324).

The spelling of 31043131013311 in words is "thirty-one trillion, forty-three billion, one hundred thirty-one million, thirteen thousand, three hundred eleven".