13520231135216 has 60 divisors (see below), whose sum is σ = 28388202570000. Its totient is φ = 6235109038080.

The previous prime is 13520231135189. The next prime is 13520231135231. The reversal of 13520231135216 is 61253113202531.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1375661 + ... + 5378931.

It is an arithmetic number, because the mean of its divisors is an integer number (473136709500).

Almost surely, 2^{13520231135216} is an apocalyptic number.

13520231135216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13520231135216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14194101285000).

13520231135216 is an abundant number, since it is smaller than the sum of its proper divisors (14867971434784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13520231135216 is a wasteful number, since it uses less digits than its factorization.

13520231135216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4004554 (or 4004535 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

Adding to 13520231135216 its reverse (61253113202531), we get a palindrome (74773344337747).

The spelling of 13520231135216 in words is "thirteen trillion, five hundred twenty billion, two hundred thirty-one million, one hundred thirty-five thousand, two hundred sixteen".