111472217 has 2 divisors, whose sum is σ = 111472218. Its totient is φ = 111472216.

The previous prime is 111472189. The next prime is 111472219. The reversal of 111472217 is 712274111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110271001 + 1201216 = 10501^2 + 1096^2 .

It is an emirp because it is prime and its reverse (712274111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111472217 - 2¹² = 111468121 is a prime.

Together with 111472219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111472219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55736108 + 55736109.

It is an arithmetic number, because the mean of its divisors is an integer number (55736109).

Almost surely, 2^111472217 is an apocalyptic number.

It is an amenable number.

111472217 is a deficient number, since it is larger than the sum of its proper divisors (1).

111472217 is an equidigital number, since it uses as much as digits as its factorization.

111472217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 784, while the sum is 26.

The square root of 111472217 is about 10558.0403958310. The cubic root of 111472217 is about 481.2700984016.

The spelling of 111472217 in words is "one hundred eleven million, four hundred seventy-two thousand, two hundred seventeen".