111444217 has 2 divisors, whose sum is σ = 111444218. Its totient is φ = 111444216.

The previous prime is 111444211. The next prime is 111444233. The reversal of 111444217 is 712444111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111007296 + 436921 = 10536^2 + 661^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111444217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111444191 and 111444200.

It is not a weakly prime, because it can be changed into another prime (111444211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55722108 + 55722109.

It is an arithmetic number, because the mean of its divisors is an integer number (55722109).

Almost surely, 2^111444217 is an apocalyptic number.

It is an amenable number.

111444217 is a deficient number, since it is larger than the sum of its proper divisors (1).

111444217 is an equidigital number, since it uses as much as digits as its factorization.

111444217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 896, while the sum is 25.

The square root of 111444217 is about 10556.7143089126. The cubic root of 111444217 is about 481.2297992983.

Adding to 111444217 its reverse (712444111), we get a palindrome (823888328).

The spelling of 111444217 in words is "one hundred eleven million, four hundred forty-four thousand, two hundred seventeen".