11865223 has 2 divisors, whose sum is σ = 11865224. Its totient is φ = 11865222.

The previous prime is 11865221. The next prime is 11865233. The reversal of 11865223 is 32256811.

11865223 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (32256811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11865223 - 2¹ = 11865221 is a prime.

Together with 11865221, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 11865191 and 11865200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11865221) 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 as a sum of consecutive naturals, namely, 5932611 + 5932612.

It is an arithmetic number, because the mean of its divisors is an integer number (5932612).

Almost surely, 2^11865223 is an apocalyptic number.

11865223 is a deficient number, since it is larger than the sum of its proper divisors (1).

11865223 is an equidigital number, since it uses as much as digits as its factorization.

11865223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 28.

The square root of 11865223 is about 3444.5932996509. The cubic root of 11865223 is about 228.0825019477.

It can be divided in two parts, 118 and 65223, that added together give a triangular number (65341 = T₃₆₁).

The spelling of 11865223 in words is "eleven million, eight hundred sixty-five thousand, two hundred twenty-three".