11561222 has 4 divisors (see below), whose sum is σ = 17341836. Its totient is φ = 5780610.

The previous prime is 11561219. The next prime is 11561237. The reversal of 11561222 is 22216511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22216511 = 167 ⋅133033.

It is a junction number, because it is equal to n+sod(n) for n = 11561194 and 11561203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2890304 + ... + 2890307.

It is an arithmetic number, because the mean of its divisors is an integer number (4335459).

Almost surely, 2^11561222 is an apocalyptic number.

11561222 is a deficient number, since it is larger than the sum of its proper divisors (5780614).

11561222 is an equidigital number, since it uses as much as digits as its factorization.

11561222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5780613.

The product of its digits is 240, while the sum is 20.

The square root of 11561222 is about 3400.1797011335. The cubic root of 11561222 is about 226.1177108890.

Adding to 11561222 its reverse (22216511), we get a palindrome (33777733).

The spelling of 11561222 in words is "eleven million, five hundred sixty-one thousand, two hundred twenty-two".