13321621567 has 4 divisors (see below), whose sum is σ = 13322675200. Its totient is φ = 13320567936.

The previous prime is 13321621561. The next prime is 13321621571. The reversal of 13321621567 is 76512612331.

13321621567 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76512612331 = 373 ⋅205127647.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13321621567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13321621561) 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 3 ways as a sum of consecutive naturals, for example, 507618 + ... + 533215.

It is an arithmetic number, because the mean of its divisors is an integer number (3330668800).

Almost surely, 2^13321621567 is an apocalyptic number.

13321621567 is a deficient number, since it is larger than the sum of its proper divisors (1053633).

13321621567 is a wasteful number, since it uses less digits than its factorization.

13321621567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1053632.

The product of its digits is 45360, while the sum is 37.

The spelling of 13321621567 in words is "thirteen billion, three hundred twenty-one million, six hundred twenty-one thousand, five hundred sixty-seven".