228828217 has 2 divisors, whose sum is σ = 228828218. Its totient is φ = 228828216.

The previous prime is 228828181. The next prime is 228828247. The reversal of 228828217 is 712828822.

228828217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 227738281 + 1089936 = 15091^2 + 1044^2 .

It is a cyclic number.

It is not a de Polignac number, because 228828217 - 2¹⁵ = 228795449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228828217.

It is not a weakly prime, because it can be changed into another prime (228828247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114414108 + 114414109.

It is an arithmetic number, because the mean of its divisors is an integer number (114414109).

Almost surely, 2^228828217 is an apocalyptic number.

It is an amenable number.

228828217 is a deficient number, since it is larger than the sum of its proper divisors (1).

228828217 is an equidigital number, since it uses as much as digits as its factorization.

228828217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57344, while the sum is 40.

The square root of 228828217 is about 15127.0690155099. The cubic root of 228828217 is about 611.6502987781.

The spelling of 228828217 in words is "two hundred twenty-eight million, eight hundred twenty-eight thousand, two hundred seventeen".