13105512331444 has 24 divisors (see below), whose sum is σ = 24716014202880. Its totient is φ = 6044494560864.

The previous prime is 13105512331391. The next prime is 13105512331453. The reversal of 13105512331444 is 44413321550131.

It is a happy number.

It is a super-2 number, since 2×13105512331444² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87496084 + ... + 87645739.

It is an arithmetic number, because the mean of its divisors is an integer number (1029833925120).

Almost surely, 2^{13105512331444} is an apocalyptic number.

It is an amenable number.

13105512331444 is a deficient number, since it is larger than the sum of its proper divisors (11610501871436).

13105512331444 is a wasteful number, since it uses less digits than its factorization.

13105512331444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175143279 (or 175143277 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

Adding to 13105512331444 its reverse (44413321550131), we get a palindrome (57518833881575).

The spelling of 13105512331444 in words is "thirteen trillion, one hundred five billion, five hundred twelve million, three hundred thirty-one thousand, four hundred forty-four".