11503223 has 4 divisors (see below), whose sum is σ = 11586120. Its totient is φ = 11420328.

The previous prime is 11503213. The next prime is 11503253. The reversal of 11503223 is 32230511.

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

It is a cyclic number.

It is not a de Polignac number, because 11503223 - 2¹² = 11499127 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 (11503213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41240 + ... + 41517.

It is an arithmetic number, because the mean of its divisors is an integer number (2896530).

Almost surely, 2^11503223 is an apocalyptic number.

11503223 is a deficient number, since it is larger than the sum of its proper divisors (82897).

11503223 is an equidigital number, since it uses as much as digits as its factorization.

11503223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82896.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 11503223 is about 3391.6401636966. The cubic root of 11503223 is about 225.7389564331.

Subtracting from 11503223 its sum of digits (17), we obtain a triangular number (11503206 = T₄₇₉₆).

Adding to 11503223 its reverse (32230511), we get a palindrome (43733734).

The spelling of 11503223 in words is "eleven million, five hundred three thousand, two hundred twenty-three".