13520213511305 has 4 divisors (see below), whose sum is σ = 16224256213572. Its totient is φ = 10816170809040.

The previous prime is 13520213511271. The next prime is 13520213511379. The reversal of 13520213511305 is 50311531202531.

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 2809307857801 + 10710905653504 = 1676099^2 + 3272752^2 .

It is not a de Polignac number, because 13520213511305 - 2¹⁰ = 13520213510281 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1352021351126 + ... + 1352021351135.

It is an arithmetic number, because the mean of its divisors is an integer number (4056064053393).

Almost surely, 2^{13520213511305} is an apocalyptic number.

It is an amenable number.

13520213511305 is a deficient number, since it is larger than the sum of its proper divisors (2704042702267).

13520213511305 is an equidigital number, since it uses as much as digits as its factorization.

13520213511305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2704042702266.

The product of its (nonzero) digits is 13500, while the sum is 32.

Adding to 13520213511305 its reverse (50311531202531), we get a palindrome (63831744713836).

The spelling of 13520213511305 in words is "thirteen trillion, five hundred twenty billion, two hundred thirteen million, five hundred eleven thousand, three hundred five".