13228013 has 4 divisors (see below), whose sum is σ = 13803168. Its totient is φ = 12652860.

The previous prime is 13228003. The next prime is 13228021. The reversal of 13228013 is 31082231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31082231 = 2089 ⋅14879.

It is a cyclic number.

It is not a de Polignac number, because 13228013 - 2⁸ = 13227757 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 (13228003) 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, 287543 + ... + 287588.

It is an arithmetic number, because the mean of its divisors is an integer number (3450792).

Almost surely, 2^13228013 is an apocalyptic number.

It is an amenable number.

13228013 is a deficient number, since it is larger than the sum of its proper divisors (575155).

13228013 is an equidigital number, since it uses as much as digits as its factorization.

13228013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575154.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 13228013 is about 3637.0335439751. The cubic root of 13228013 is about 236.5002138001.

The spelling of 13228013 in words is "thirteen million, two hundred twenty-eight thousand, thirteen".