228228911 has 2 divisors, whose sum is σ = 228228912. Its totient is φ = 228228910.

The previous prime is 228228901. The next prime is 228228941. The reversal of 228228911 is 119822822.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228228911 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228228901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114114455 + 114114456.

It is an arithmetic number, because the mean of its divisors is an integer number (114114456).

Almost surely, 2^228228911 is an apocalyptic number.

228228911 is a deficient number, since it is larger than the sum of its proper divisors (1).

228228911 is an equidigital number, since it uses as much as digits as its factorization.

228228911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 35.

The square root of 228228911 is about 15107.2469695838. The cubic root of 228228911 is about 611.1158568582.

The spelling of 228228911 in words is "two hundred twenty-eight million, two hundred twenty-eight thousand, nine hundred eleven".