13518223 has 4 divisors (see below), whose sum is σ = 13528528. Its totient is φ = 13507920.

The previous prime is 13518221. The next prime is 13518277. The reversal of 13518223 is 32281531.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 32281531 = 181 ⋅178351.

It is a cyclic number.

It is not a de Polignac number, because 13518223 - 2¹ = 13518221 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 (13518221) 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, 2838 + ... + 5923.

It is an arithmetic number, because the mean of its divisors is an integer number (3382132).

Almost surely, 2^13518223 is an apocalyptic number.

13518223 is a deficient number, since it is larger than the sum of its proper divisors (10305).

13518223 is an equidigital number, since it uses as much as digits as its factorization.

13518223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10304.

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

The square root of 13518223 is about 3676.7136140853. The cubic root of 13518223 is about 238.2172474371.

Adding to 13518223 its reverse (32281531), we get a palindrome (45799754).

The spelling of 13518223 in words is "thirteen million, five hundred eighteen thousand, two hundred twenty-three".