13111515442431 has 32 divisors (see below), whose sum is σ = 22217875699200. Its totient is φ = 7486056028800.

The previous prime is 13111515442429. The next prime is 13111515442477. The reversal of 13111515442431 is 13424451511131.

13111515442431 is a `hidden beast` number, since 1 + 3 + 1 + 1 + 151 + 54 + 424 + 31 = 666.

It is not a de Polignac number, because 13111515442431 - 2¹ = 13111515442429 is a prime.

It is a super-2 number, since 2×13111515442431² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13111515442931) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28654401 + ... + 29108378.

It is an arithmetic number, because the mean of its divisors is an integer number (694308615600).

Almost surely, 2^{13111515442431} is an apocalyptic number.

13111515442431 is a deficient number, since it is larger than the sum of its proper divisors (9106360256769).

13111515442431 is a wasteful number, since it uses less digits than its factorization.

13111515442431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57763996 (or 57763990 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

Adding to 13111515442431 its reverse (13424451511131), we get a palindrome (26535966953562).

The spelling of 13111515442431 in words is "thirteen trillion, one hundred eleven billion, five hundred fifteen million, four hundred forty-two thousand, four hundred thirty-one".