13055221345 has 4 divisors (see below), whose sum is σ = 15666265620. Its totient is φ = 10444177072.

The previous prime is 13055221327. The next prime is 13055221373. The reversal of 13055221345 is 54312255031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7166807649 + 5888413696 = 84657^2 + 76736^2 .

It is a cyclic number.

It is not a de Polignac number, because 13055221345 - 2⁹ = 13055220833 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1305522130 + ... + 1305522139.

It is an arithmetic number, because the mean of its divisors is an integer number (3916566405).

Almost surely, 2^13055221345 is an apocalyptic number.

It is an amenable number.

13055221345 is a deficient number, since it is larger than the sum of its proper divisors (2611044275).

13055221345 is an equidigital number, since it uses as much as digits as its factorization.

13055221345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2611044274.

The product of its (nonzero) digits is 18000, while the sum is 31.

Adding to 13055221345 its reverse (54312255031), we get a palindrome (67367476376).

The spelling of 13055221345 in words is "thirteen billion, fifty-five million, two hundred twenty-one thousand, three hundred forty-five".