13221673791 has 8 divisors (see below), whose sum is σ = 17707952640. Its totient is φ = 8774922072.

The previous prime is 13221673783. The next prime is 13221673799. The reversal of 13221673791 is 19737612231.

It is an interprime number because it is at equal distance from previous prime (13221673783) and next prime (13221673799).

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

It is not a de Polignac number, because 13221673791 - 2³ = 13221673783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221673799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9881001 + ... + 9882338.

It is an arithmetic number, because the mean of its divisors is an integer number (2213494080).

Almost surely, 2^13221673791 is an apocalyptic number.

13221673791 is a deficient number, since it is larger than the sum of its proper divisors (4486278849).

13221673791 is a wasteful number, since it uses less digits than its factorization.

13221673791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19763565.

The product of its digits is 95256, while the sum is 42.

The spelling of 13221673791 in words is "thirteen billion, two hundred twenty-one million, six hundred seventy-three thousand, seven hundred ninety-one".