13220611 has 4 divisors (see below), whose sum is σ = 13998312. Its totient is φ = 12442912.

The previous prime is 13220609. The next prime is 13220629. The reversal of 13220611 is 11602231.

13220611 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.

It is not a de Polignac number, because 13220611 - 2¹ = 13220609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13220671) 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, 388825 + ... + 388858.

It is an arithmetic number, because the mean of its divisors is an integer number (3499578).

Almost surely, 2^13220611 is an apocalyptic number.

13220611 is a deficient number, since it is larger than the sum of its proper divisors (777701).

13220611 is an equidigital number, since it uses as much as digits as its factorization.

13220611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777700.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 13220611 is about 3636.0158140470. The cubic root of 13220611 is about 236.4560927567.

Adding to 13220611 its reverse (11602231), we get a palindrome (24822842).

It can be divided in two parts, 13220 and 611, that added together give a palindrome (13831).

The spelling of 13220611 in words is "thirteen million, two hundred twenty thousand, six hundred eleven".