228112211 has 2 divisors, whose sum is σ = 228112212. Its totient is φ = 228112210.

The previous prime is 228112201. The next prime is 228112219. The reversal of 228112211 is 112211822.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228112211 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (228112219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114056105 + 114056106.

It is an arithmetic number, because the mean of its divisors is an integer number (114056106).

Almost surely, 2^228112211 is an apocalyptic number.

228112211 is a deficient number, since it is larger than the sum of its proper divisors (1).

228112211 is an equidigital number, since it uses as much as digits as its factorization.

228112211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 128, while the sum is 20.

The square root of 228112211 is about 15103.3840909910. The cubic root of 228112211 is about 611.0116787340.

The spelling of 228112211 in words is "two hundred twenty-eight million, one hundred twelve thousand, two hundred eleven".