13511223 has 36 divisors (see below), whose sum is σ = 22615320. Its totient is φ = 7745760.

The previous prime is 13511221. The next prime is 13511249. The reversal of 13511223 is 32211531.

It is not a de Polignac number, because 13511223 - 2¹ = 13511221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13511196 and 13511205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13511221) 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 35 ways as a sum of consecutive naturals, for example, 20365 + ... + 21017.

Almost surely, 2^13511223 is an apocalyptic number.

13511223 is a deficient number, since it is larger than the sum of its proper divisors (9104097).

13511223 is a wasteful number, since it uses less digits than its factorization.

13511223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700 (or 686 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 13511223 is about 3675.7615537464. The cubic root of 13511223 is about 238.1761224894.

Adding to 13511223 its reverse (32211531), we get a palindrome (45722754).

The spelling of 13511223 in words is "thirteen million, five hundred eleven thousand, two hundred twenty-three".