13521255065 has 16 divisors (see below), whose sum is σ = 17926904448. Its totient is φ = 9738068736.

The previous prime is 13521255053. The next prime is 13521255073. The reversal of 13521255065 is 56055212531.

It is a cyclic number.

It is not a de Polignac number, because 13521255065 - 2⁸ = 13521254809 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3456167 + ... + 3460076.

It is an arithmetic number, because the mean of its divisors is an integer number (1120431528).

Almost surely, 2^13521255065 is an apocalyptic number.

It is an amenable number.

13521255065 is a deficient number, since it is larger than the sum of its proper divisors (4405649383).

13521255065 is a wasteful number, since it uses less digits than its factorization.

13521255065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6916288.

The product of its (nonzero) digits is 45000, while the sum is 35.

Adding to 13521255065 its reverse (56055212531), we get a palindrome (69576467596).

The spelling of 13521255065 in words is "thirteen billion, five hundred twenty-one million, two hundred fifty-five thousand, sixty-five".