11518223 has 2 divisors, whose sum is σ = 11518224. Its totient is φ = 11518222.

The previous prime is 11518219. The next prime is 11518261. The reversal of 11518223 is 32281511.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (32281511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11518223 - 2² = 11518219 is a prime.

It is a super-2 number, since 2×11518223² = 265338922155458, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11518523) 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 as a sum of consecutive naturals, namely, 5759111 + 5759112.

It is an arithmetic number, because the mean of its divisors is an integer number (5759112).

Almost surely, 2^11518223 is an apocalyptic number.

11518223 is a deficient number, since it is larger than the sum of its proper divisors (1).

11518223 is an equidigital number, since it uses as much as digits as its factorization.

11518223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 480, while the sum is 23.

The square root of 11518223 is about 3393.8507627767. The cubic root of 11518223 is about 225.8370336883.

Adding to 11518223 its reverse (32281511), we get a palindrome (43799734).

The spelling of 11518223 in words is "eleven million, five hundred eighteen thousand, two hundred twenty-three".