13223421 has 12 divisors (see below), whose sum is σ = 19178172. Its totient is φ = 8779776.

The previous prime is 13223401. The next prime is 13223423. The reversal of 13223421 is 12432231.

13223421 is a `hidden beast` number, since 1 + 322 + 342 + 1 = 666.

13223421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11088900 + 2134521 = 3330^2 + 1461^2 .

It is not a de Polignac number, because 13223421 - 2⁵ = 13223389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13223394 and 13223403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13223423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 546 + ... + 5171.

It is an arithmetic number, because the mean of its divisors is an integer number (1598181).

Almost surely, 2^13223421 is an apocalyptic number.

It is an amenable number.

13223421 is a deficient number, since it is larger than the sum of its proper divisors (5954751).

13223421 is a wasteful number, since it uses less digits than its factorization.

13223421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5980 (or 5977 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 13223421 is about 3636.4022054773. The cubic root of 13223421 is about 236.4728442405.

Adding to 13223421 its reverse (12432231), we get a palindrome (25655652).

The spelling of 13223421 in words is "thirteen million, two hundred twenty-three thousand, four hundred twenty-one".