13228513 has 4 divisors (see below), whose sum is σ = 13245120. Its totient is φ = 13211908.

The previous prime is 13228489. The next prime is 13228529. The reversal of 13228513 is 31582231.

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: 31582231 = 643 ⋅49117.

It is a cyclic number.

It is not a de Polignac number, because 13228513 - 2⁹ = 13228001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13228913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7045 + ... + 8722.

It is an arithmetic number, because the mean of its divisors is an integer number (3311280).

Almost surely, 2^13228513 is an apocalyptic number.

It is an amenable number.

13228513 is a deficient number, since it is larger than the sum of its proper divisors (16607).

13228513 is an equidigital number, since it uses as much as digits as its factorization.

13228513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16606.

The product of its digits is 1440, while the sum is 25.

The square root of 13228513 is about 3637.1022806625. The cubic root of 13228513 is about 236.5031935527.

The spelling of 13228513 in words is "thirteen million, two hundred twenty-eight thousand, five hundred thirteen".