13550223 has 4 divisors (see below), whose sum is σ = 18066968. Its totient is φ = 9033480.

The previous prime is 13550219. The next prime is 13550231. The reversal of 13550223 is 32205531.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13550223 - 2² = 13550219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13550223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13550233) 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, 2258368 + ... + 2258373.

It is an arithmetic number, because the mean of its divisors is an integer number (4516742).

Almost surely, 2^13550223 is an apocalyptic number.

13550223 is a deficient number, since it is larger than the sum of its proper divisors (4516745).

13550223 is an equidigital number, since it uses as much as digits as its factorization.

13550223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4516744.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 13550223 is about 3681.0627541513. The cubic root of 13550223 is about 238.4050666217.

Adding to 13550223 its reverse (32205531), we get a palindrome (45755754).

The spelling of 13550223 in words is "thirteen million, five hundred fifty thousand, two hundred twenty-three".