13105385281 has 4 divisors (see below), whose sum is σ = 13192176064. Its totient is φ = 13018594500.

The previous prime is 13105385231. The next prime is 13105385309. The reversal of 13105385281 is 18258350131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13105385281 - 2²⁷ = 12971167553 is a prime.

It is a super-2 number, since 2×13105385281² (a number of 21 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 13105385281.

It is not an unprimeable number, because it can be changed into a prime (13105385231) 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, 43395165 + ... + 43395466.

It is an arithmetic number, because the mean of its divisors is an integer number (3298044016).

Almost surely, 2^13105385281 is an apocalyptic number.

It is an amenable number.

13105385281 is a deficient number, since it is larger than the sum of its proper divisors (86790783).

13105385281 is an equidigital number, since it uses as much as digits as its factorization.

13105385281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86790782.

The product of its (nonzero) digits is 28800, while the sum is 37.

The spelling of 13105385281 in words is "thirteen billion, one hundred five million, three hundred eighty-five thousand, two hundred eighty-one".