13215631328 has 24 divisors (see below), whose sum is σ = 26857575360. Its totient is φ = 6394659840.

The previous prime is 13215631301. The next prime is 13215631333. The reversal of 13215631328 is 82313651231.

13215631328 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×13215631328² (a number of 21 digits) contains 22 as substring.

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, 6660113 + ... + 6662096.

It is an arithmetic number, because the mean of its divisors is an integer number (1119065640).

Almost surely, 2^13215631328 is an apocalyptic number.

It is an amenable number.

13215631328 is an abundant number, since it is smaller than the sum of its proper divisors (13641944032).

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

13215631328 is a wasteful number, since it uses less digits than its factorization.

13215631328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13322250 (or 13322242 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The spelling of 13215631328 in words is "thirteen billion, two hundred fifteen million, six hundred thirty-one thousand, three hundred twenty-eight".