31140044013 has 8 divisors (see below), whose sum is σ = 44713909408. Its totient is φ = 19163103984.

The previous prime is 31140043937. The next prime is 31140044021. The reversal of 31140044013 is 31044004113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31140044013 - 2⁸ = 31140043757 is a prime.

It is a super-2 number, since 2×31140044013² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31140044093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 399231295 + ... + 399231372.

It is an arithmetic number, because the mean of its divisors is an integer number (5589238676).

Almost surely, 2^31140044013 is an apocalyptic number.

It is an amenable number.

31140044013 is a deficient number, since it is larger than the sum of its proper divisors (13573865395).

31140044013 is a wasteful number, since it uses less digits than its factorization.

31140044013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798462683.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 31140044013 its reverse (31044004113), we get a palindrome (62184048126).

The spelling of 31140044013 in words is "thirty-one billion, one hundred forty million, forty-four thousand, thirteen".