228123817 has 2 divisors, whose sum is σ = 228123818. Its totient is φ = 228123816.

The previous prime is 228123809. The next prime is 228123839. The reversal of 228123817 is 718321822.

228123817 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 can be written as a sum of positive squares in only one way, i.e., 119880601 + 108243216 = 10949^2 + 10404^2 .

It is a cyclic number.

It is not a de Polignac number, because 228123817 - 2³ = 228123809 is a prime.

It is not a weakly prime, because it can be changed into another prime (228123887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114061908 + 114061909.

It is an arithmetic number, because the mean of its divisors is an integer number (114061909).

Almost surely, 2^228123817 is an apocalyptic number.

It is an amenable number.

228123817 is a deficient number, since it is larger than the sum of its proper divisors (1).

228123817 is an equidigital number, since it uses as much as digits as its factorization.

228123817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 34.

The square root of 228123817 is about 15103.7683046318. The cubic root of 228123817 is about 611.0220410045.

The spelling of 228123817 in words is "two hundred twenty-eight million, one hundred twenty-three thousand, eight hundred seventeen".