11155223 has 4 divisors (see below), whose sum is σ = 11742360. Its totient is φ = 10568088.

The previous prime is 11155219. The next prime is 11155267. The reversal of 11155223 is 32255111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11155223 - 2² = 11155219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11155195 and 11155204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11155273) 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 in 3 ways as a sum of consecutive naturals, for example, 293540 + ... + 293577.

It is an arithmetic number, because the mean of its divisors is an integer number (2935590).

Almost surely, 2^11155223 is an apocalyptic number.

11155223 is a deficient number, since it is larger than the sum of its proper divisors (587137).

11155223 is an equidigital number, since it uses as much as digits as its factorization.

11155223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587136.

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

The square root of 11155223 is about 3339.9435623974. The cubic root of 11155223 is about 223.4392262862.

It can be divided in two parts, 11155 and 223, that multiplied together give a triangular number (2487565 = T₂₂₃₀).

The spelling of 11155223 in words is "eleven million, one hundred fifty-five thousand, two hundred twenty-three".