13430332521 has 8 divisors (see below), whose sum is σ = 19896788960. Its totient is φ = 8953554996.

The previous prime is 13430332519. The next prime is 13430332529. The reversal of 13430332521 is 12523303431.

13430332521 is a `hidden beast` number, since 1 + 34 + 303 + 325 + 2 + 1 = 666.

It is not a de Polignac number, because 13430332521 - 2¹ = 13430332519 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 497419723 = 13430332521 / (1 + 3 + 4 + 3 + 0 + 3 + 3 + 2 + 5 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13430332529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248709835 + ... + 248709888.

It is an arithmetic number, because the mean of its divisors is an integer number (2487098620).

Almost surely, 2^13430332521 is an apocalyptic number.

It is an amenable number.

13430332521 is a deficient number, since it is larger than the sum of its proper divisors (6466456439).

13430332521 is an equidigital number, since it uses as much as digits as its factorization.

13430332521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497419732 (or 497419726 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

Adding to 13430332521 its reverse (12523303431), we get a palindrome (25953635952).

The spelling of 13430332521 in words is "thirteen billion, four hundred thirty million, three hundred thirty-two thousand, five hundred twenty-one".