13258221 has 4 divisors (see below), whose sum is σ = 17677632. Its totient is φ = 8838812.

The previous prime is 13258213. The next prime is 13258243. The reversal of 13258221 is 12285231.

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.

It is a cyclic number.

It is not a de Polignac number, because 13258221 - 2³ = 13258213 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13258191 and 13258200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13258261) 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, 2209701 + ... + 2209706.

It is an arithmetic number, because the mean of its divisors is an integer number (4419408).

Almost surely, 2^13258221 is an apocalyptic number.

It is an amenable number.

13258221 is a deficient number, since it is larger than the sum of its proper divisors (4419411).

13258221 is an equidigital number, since it uses as much as digits as its factorization.

13258221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4419410.

The product of its digits is 960, while the sum is 24.

The square root of 13258221 is about 3641.1840107306. The cubic root of 13258221 is about 236.6801039341.

The spelling of 13258221 in words is "thirteen million, two hundred fifty-eight thousand, two hundred twenty-one".