13220526791 has 4 divisors (see below), whose sum is σ = 13220756784. Its totient is φ = 13220296800.

The previous prime is 13220526763. The next prime is 13220526863. The reversal of 13220526791 is 19762502231.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13220526791 - 2¹⁸ = 13220264647 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 (13220520791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54671 + ... + 171551.

It is an arithmetic number, because the mean of its divisors is an integer number (3305189196).

Almost surely, 2^13220526791 is an apocalyptic number.

13220526791 is a deficient number, since it is larger than the sum of its proper divisors (229993).

13220526791 is a wasteful number, since it uses less digits than its factorization.

13220526791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229992.

The product of its (nonzero) digits is 45360, while the sum is 38.

The spelling of 13220526791 in words is "thirteen billion, two hundred twenty million, five hundred twenty-six thousand, seven hundred ninety-one".