13220423 has 4 divisors (see below), whose sum is σ = 13795248. Its totient is φ = 12645600.

The previous prime is 13220419. The next prime is 13220437. The reversal of 13220423 is 32402231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32402231 = 2267 ⋅14293.

It is a cyclic number.

It is not a de Polignac number, because 13220423 - 2² = 13220419 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 (13220023) 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, 287378 + ... + 287423.

It is an arithmetic number, because the mean of its divisors is an integer number (3448812).

Almost surely, 2^13220423 is an apocalyptic number.

13220423 is a deficient number, since it is larger than the sum of its proper divisors (574825).

13220423 is an equidigital number, since it uses as much as digits as its factorization.

13220423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574824.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 13220423 is about 3635.9899614823. The cubic root of 13220423 is about 236.4549719322.

Adding to 13220423 its reverse (32402231), we get a palindrome (45622654).

The spelling of 13220423 in words is "thirteen million, two hundred twenty thousand, four hundred twenty-three".