228685187 has 2 divisors, whose sum is σ = 228685188. Its totient is φ = 228685186.

The previous prime is 228685183. The next prime is 228685199. The reversal of 228685187 is 781586822.

228685187 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228685187 - 2² = 228685183 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (228685183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114342593 + 114342594.

It is an arithmetic number, because the mean of its divisors is an integer number (114342594).

Almost surely, 2^228685187 is an apocalyptic number.

228685187 is a deficient number, since it is larger than the sum of its proper divisors (1).

228685187 is an equidigital number, since it uses as much as digits as its factorization.

228685187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 430080, while the sum is 47.

The square root of 228685187 is about 15122.3406587737. The cubic root of 228685187 is about 611.5228340548.

The spelling of 228685187 in words is "two hundred twenty-eight million, six hundred eighty-five thousand, one hundred eighty-seven".