11213523 has 12 divisors (see below), whose sum is σ = 17150328. Its totient is φ = 7035840.

The previous prime is 11213519. The next prime is 11213533. The reversal of 11213523 is 32531211.

It is not a de Polignac number, because 11213523 - 2² = 11213519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11213496 and 11213505.

It is not an unprimeable number, because it can be changed into a prime (11213513) 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 11 ways as a sum of consecutive naturals, for example, 36493 + ... + 36798.

It is an arithmetic number, because the mean of its divisors is an integer number (1429194).

Almost surely, 2^11213523 is an apocalyptic number.

11213523 is a deficient number, since it is larger than the sum of its proper divisors (5936805).

11213523 is a wasteful number, since it uses less digits than its factorization.

11213523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73314 (or 73311 counting only the distinct ones).

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

The square root of 11213523 is about 3348.6598812062. The cubic root of 11213523 is about 223.8278000000.

Adding to 11213523 its reverse (32531211), we get a palindrome (43744734).

The spelling of 11213523 in words is "eleven million, two hundred thirteen thousand, five hundred twenty-three".