11556223 has 4 divisors (see below), whose sum is σ = 13207120. Its totient is φ = 9905328.

The previous prime is 11556221. The next prime is 11556257. The reversal of 11556223 is 32265511.

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 11556223 - 2¹ = 11556221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11556221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 825438 + ... + 825451.

It is an arithmetic number, because the mean of its divisors is an integer number (3301780).

Almost surely, 2^11556223 is an apocalyptic number.

11556223 is a deficient number, since it is larger than the sum of its proper divisors (1650897).

11556223 is an equidigital number, since it uses as much as digits as its factorization.

11556223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650896.

The product of its digits is 1800, while the sum is 25.

The square root of 11556223 is about 3399.4445134463. Note that the first 3 decimals coincide. The cubic root of 11556223 is about 226.0851155631.

It can be divided in two parts, 1155622 and 3, that added together give a square (1155625 = 1075²).

The spelling of 11556223 in words is "eleven million, five hundred fifty-six thousand, two hundred twenty-three".