13304601521 has 4 divisors (see below), whose sum is σ = 13316513652. Its totient is φ = 13292689392.

The previous prime is 13304601517. The next prime is 13304601533. The reversal of 13304601521 is 12510640331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 571735921 + 12732865600 = 23911^2 + 112840^2 .

It is a cyclic number.

It is not a de Polignac number, because 13304601521 - 2² = 13304601517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13304601511) 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, 5954390 + ... + 5956623.

It is an arithmetic number, because the mean of its divisors is an integer number (3329128413).

Almost surely, 2^13304601521 is an apocalyptic number.

It is an amenable number.

13304601521 is a deficient number, since it is larger than the sum of its proper divisors (11912131).

13304601521 is a wasteful number, since it uses less digits than its factorization.

13304601521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11912130.

The product of its (nonzero) digits is 2160, while the sum is 26.

The spelling of 13304601521 in words is "thirteen billion, three hundred four million, six hundred one thousand, five hundred twenty-one".