228112189 has 2 divisors, whose sum is σ = 228112190. Its totient is φ = 228112188.

The previous prime is 228112187. The next prime is 228112201. The reversal of 228112189 is 981211822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204004089 + 24108100 = 14283^2 + 4910^2 .

It is a cyclic number.

It is not a de Polignac number, because 228112189 - 2¹ = 228112187 is a prime.

Together with 228112187, it forms a pair of twin primes.

It is equal to p_12544387 and since 228112189 and 12544387 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228112187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114056094 + 114056095.

It is an arithmetic number, because the mean of its divisors is an integer number (114056095).

Almost surely, 2^228112189 is an apocalyptic number.

It is an amenable number.

228112189 is a deficient number, since it is larger than the sum of its proper divisors (1).

228112189 is an equidigital number, since it uses as much as digits as its factorization.

228112189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 34.

The square root of 228112189 is about 15103.3833626774. The cubic root of 228112189 is about 611.0116590913.

The spelling of 228112189 in words is "two hundred twenty-eight million, one hundred twelve thousand, one hundred eighty-nine".