13213223 has 4 divisors (see below), whose sum is σ = 13639488. Its totient is φ = 12786960.

The previous prime is 13213159. The next prime is 13213229. The reversal of 13213223 is 32231231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32231231 = 71 ⋅453961.

It is a cyclic number.

It is not a de Polignac number, because 13213223 - 2⁶ = 13213159 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 (13213229) 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, 213086 + ... + 213147.

It is an arithmetic number, because the mean of its divisors is an integer number (3409872).

Almost surely, 2^13213223 is an apocalyptic number.

13213223 is a deficient number, since it is larger than the sum of its proper divisors (426265).

13213223 is an equidigital number, since it uses as much as digits as its factorization.

13213223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426264.

The product of its digits is 216, while the sum is 17.

The square root of 13213223 is about 3634.9997248968. Note that the first 3 decimals coincide. The cubic root of 13213223 is about 236.4120387382.

Adding to 13213223 its reverse (32231231), we get a palindrome (45444454).

The spelling of 13213223 in words is "thirteen million, two hundred thirteen thousand, two hundred twenty-three".