11217222 has 24 divisors (see below), whose sum is σ = 24373440. Its totient is φ = 3728400.

The previous prime is 11217221. The next prime is 11217233. The reversal of 11217222 is 22271211.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 11217195 and 11217204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11217221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7972 + ... + 9272.

It is an arithmetic number, because the mean of its divisors is an integer number (1015560).

Almost surely, 2^11217222 is an apocalyptic number.

11217222 is an abundant number, since it is smaller than the sum of its proper divisors (13156218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11217222 is a wasteful number, since it uses less digits than its factorization.

11217222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1788 (or 1785 counting only the distinct ones).

The product of its digits is 112, while the sum is 18.

The square root of 11217222 is about 3349.2121461621. The cubic root of 11217222 is about 223.8524086210.

Adding to 11217222 its reverse (22271211), we get a palindrome (33488433).

The spelling of 11217222 in words is "eleven million, two hundred seventeen thousand, two hundred twenty-two".