11217423 has 24 divisors (see below), whose sum is σ = 17556912. Its totient is φ = 6351744.

The previous prime is 11217419. The next prime is 11217463. The reversal of 11217423 is 32471211.

11217423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11217423 - 2² = 11217419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 11217423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11217413) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19861 + ... + 20417.

It is an arithmetic number, because the mean of its divisors is an integer number (731538).

Almost surely, 2^11217423 is an apocalyptic number.

11217423 is a deficient number, since it is larger than the sum of its proper divisors (6339489).

11217423 is a wasteful number, since it uses less digits than its factorization.

11217423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711 (or 704 counting only the distinct ones).

The product of its digits is 336, while the sum is 21.

The square root of 11217423 is about 3349.2421530848. The cubic root of 11217423 is about 223.8537456741.

Adding to 11217423 its reverse (32471211), we get a palindrome (43688634).

The spelling of 11217423 in words is "eleven million, two hundred seventeen thousand, four hundred twenty-three".