11217523 has 2 divisors, whose sum is σ = 11217524. Its totient is φ = 11217522.

The previous prime is 11217463. The next prime is 11217541. The reversal of 11217523 is 32571211.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11217523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11217494 and 11217503.

It is not a weakly prime, because it can be changed into another prime (11217553) 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 as a sum of consecutive naturals, namely, 5608761 + 5608762.

It is an arithmetic number, because the mean of its divisors is an integer number (5608762).

Almost surely, 2^11217523 is an apocalyptic number.

11217523 is a deficient number, since it is larger than the sum of its proper divisors (1).

11217523 is an equidigital number, since it uses as much as digits as its factorization.

11217523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 420, while the sum is 22.

The square root of 11217523 is about 3349.2570818019. The cubic root of 11217523 is about 223.8544108687.

Adding to 11217523 its reverse (32571211), we get a palindrome (43788734).

The spelling of 11217523 in words is "eleven million, two hundred seventeen thousand, five hundred twenty-three".