228585911 has 2 divisors, whose sum is σ = 228585912. Its totient is φ = 228585910.

The previous prime is 228585899. The next prime is 228585953. The reversal of 228585911 is 119585822.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228585911 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 (228585011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114292955 + 114292956.

It is an arithmetic number, because the mean of its divisors is an integer number (114292956).

Almost surely, 2^228585911 is an apocalyptic number.

228585911 is a deficient number, since it is larger than the sum of its proper divisors (1).

228585911 is an equidigital number, since it uses as much as digits as its factorization.

228585911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57600, while the sum is 41.

The square root of 228585911 is about 15119.0578740873. The cubic root of 228585911 is about 611.4343305408.

The spelling of 228585911 in words is "two hundred twenty-eight million, five hundred eighty-five thousand, nine hundred eleven".