228018647 has 2 divisors, whose sum is σ = 228018648. Its totient is φ = 228018646.

The previous prime is 228018643. The next prime is 228018649. The reversal of 228018647 is 746810822.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 228018647 - 2² = 228018643 is a prime.

Together with 228018649, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228018647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228018643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114009323 + 114009324.

It is an arithmetic number, because the mean of its divisors is an integer number (114009324).

Almost surely, 2^228018647 is an apocalyptic number.

228018647 is a deficient number, since it is larger than the sum of its proper divisors (1).

228018647 is an equidigital number, since it uses as much as digits as its factorization.

228018647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 228018647 is about 15100.2863217887. The cubic root of 228018647 is about 610.9281284578.

The spelling of 228018647 in words is "two hundred twenty-eight million, eighteen thousand, six hundred forty-seven".