11213503 has 6 divisors (see below), whose sum is σ = 13044336. Its totient is φ = 9611532.

The previous prime is 11213471. The next prime is 11213509. The reversal of 11213503 is 30531211.

It is not a de Polignac number, because 11213503 - 2⁵ = 11213471 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 (11213509) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 114375 + ... + 114472.

It is an arithmetic number, because the mean of its divisors is an integer number (2174056).

Almost surely, 2^11213503 is an apocalyptic number.

11213503 is a deficient number, since it is larger than the sum of its proper divisors (1830833).

11213503 is an equidigital number, since it uses as much as digits as its factorization.

11213503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228861 (or 228854 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 11213503 is about 3348.6568949356. The cubic root of 11213503 is about 223.8276669297.

Adding to 11213503 its reverse (30531211), we get a palindrome (41744714).

It can be divided in two parts, 1121 and 3503, that added together give a square (4624 = 68²).

The spelling of 11213503 in words is "eleven million, two hundred thirteen thousand, five hundred three".