11223155 has 4 divisors (see below), whose sum is σ = 13467792. Its totient is φ = 8978520.

The previous prime is 11223151. The next prime is 11223161. The reversal of 11223155 is 55132211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55132211 = 167 ⋅330133.

It is not a de Polignac number, because 11223155 - 2² = 11223151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11223151) 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 3 ways as a sum of consecutive naturals, for example, 1122311 + ... + 1122320.

It is an arithmetic number, because the mean of its divisors is an integer number (3366948).

Almost surely, 2^11223155 is an apocalyptic number.

11223155 is a deficient number, since it is larger than the sum of its proper divisors (2244637).

11223155 is an equidigital number, since it uses as much as digits as its factorization.

11223155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244636.

The product of its digits is 300, while the sum is 20.

The square root of 11223155 is about 3350.0977597676. The cubic root of 11223155 is about 223.8918682499.

Adding to 11223155 its reverse (55132211), we get a palindrome (66355366).

The spelling of 11223155 in words is "eleven million, two hundred twenty-three thousand, one hundred fifty-five".