13431536221 has 8 divisors (see below), whose sum is σ = 14232094400. Its totient is φ = 12640341600.

The previous prime is 13431536203. The next prime is 13431536233. The reversal of 13431536221 is 12263513431.

13431536221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13431536221 - 2²¹ = 13429439069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13431536281) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2337936 + ... + 2343673.

It is an arithmetic number, because the mean of its divisors is an integer number (1779011800).

Almost surely, 2^13431536221 is an apocalyptic number.

It is an amenable number.

13431536221 is a deficient number, since it is larger than the sum of its proper divisors (800558179).

13431536221 is a wasteful number, since it uses less digits than its factorization.

13431536221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4681779.

The product of its digits is 12960, while the sum is 31.

The spelling of 13431536221 in words is "thirteen billion, four hundred thirty-one million, five hundred thirty-six thousand, two hundred twenty-one".