13211505872 has 20 divisors (see below), whose sum is σ = 26479958820. Its totient is φ = 6377968128.

The previous prime is 13211505863. The next prime is 13211505887. The reversal of 13211505872 is 27850511231.

13211505872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11021640256 + 2189865616 = 104984^2 + 46796^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14236073 + ... + 14237000.

It is an arithmetic number, because the mean of its divisors is an integer number (1323997941).

Almost surely, 2^13211505872 is an apocalyptic number.

It is an amenable number.

13211505872 is an abundant number, since it is smaller than the sum of its proper divisors (13268452948).

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

13211505872 is a wasteful number, since it uses less digits than its factorization.

13211505872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28473110 (or 28473104 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 35.

The spelling of 13211505872 in words is "thirteen billion, two hundred eleven million, five hundred five thousand, eight hundred seventy-two".