13520256043 has 16 divisors (see below), whose sum is σ = 16489488384. Its totient is φ = 10821202560.

The previous prime is 13520256017. The next prime is 13520256047. The reversal of 13520256043 is 34065202531.

It is a happy number.

It is not a de Polignac number, because 13520256043 - 2²⁵ = 13486701611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13520255996 and 13520256014.

It is not an unprimeable number, because it can be changed into a prime (13520256047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 432193 + ... + 462418.

It is an arithmetic number, because the mean of its divisors is an integer number (1030593024).

Almost surely, 2^13520256043 is an apocalyptic number.

13520256043 is a deficient number, since it is larger than the sum of its proper divisors (2969232341).

13520256043 is a wasteful number, since it uses less digits than its factorization.

13520256043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894762.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 13520256043 its reverse (34065202531), we get a palindrome (47585458574).

The spelling of 13520256043 in words is "thirteen billion, five hundred twenty million, two hundred fifty-six thousand, forty-three".