228606217 has 12 divisors (see below), whose sum is σ = 275101380. Its totient is φ = 189190176.

The previous prime is 228606197. The next prime is 228606221. The reversal of 228606217 is 712606822.

It can be written as a sum of positive squares in 2 ways, for example, as 143616256 + 84989961 = 11984^2 + 9219^2 .

It is a de Polignac number, because none of the positive numbers 2^k-228606217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228606227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79018 + ... + 81859.

It is an arithmetic number, because the mean of its divisors is an integer number (22925115).

Almost surely, 2^228606217 is an apocalyptic number.

It is an amenable number.

228606217 is a deficient number, since it is larger than the sum of its proper divisors (46495163).

228606217 is a wasteful number, since it uses less digits than its factorization.

228606217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160920 (or 160913 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 228606217 is about 15119.7293957266. The cubic root of 228606217 is about 611.4524352114.

The spelling of 228606217 in words is "two hundred twenty-eight million, six hundred six thousand, two hundred seventeen".