13440042404031 has 4 divisors (see below), whose sum is σ = 17920056538712. Its totient is φ = 8960028269352.

The previous prime is 13440042404029. The next prime is 13440042404051. The reversal of 13440042404031 is 13040424004431.

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

It is not a de Polignac number, because 13440042404031 - 2¹ = 13440042404029 is a prime.

It is a super-2 number, since 2×13440042404031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13440042404031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13440042404011) 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, 2240007067336 + ... + 2240007067341.

It is an arithmetic number, because the mean of its divisors is an integer number (4480014134678).

Almost surely, 2^{13440042404031} is an apocalyptic number.

13440042404031 is a deficient number, since it is larger than the sum of its proper divisors (4480014134681).

13440042404031 is an equidigital number, since it uses as much as digits as its factorization.

13440042404031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4480014134680.

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 13440042404031 its reverse (13040424004431), we get a palindrome (26480466408462).

The spelling of 13440042404031 in words is "thirteen trillion, four hundred forty billion, forty-two million, four hundred four thousand, thirty-one".