228145193 has 2 divisors, whose sum is σ = 228145194.
Its totient is φ = 228145192.
The previous prime is 228145187. The next prime is 228145259. The reversal of 228145193 is 391541822.
It can be divided in two parts, 2281 and 45193, that added together give a palindrome (47474).
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 189667984 + 38477209 = 13772^2 + 6203^2
It is a cyclic number.
It is not a de Polignac number, because 228145193 - 218 = 227883049 is a prime.
It is not a weakly prime, because it can be changed into another prime (228145123) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114072596 + 114072597.
It is an arithmetic number, because the mean of its divisors is an integer number (114072597).
Almost surely, 2228145193 is an apocalyptic number.
It is an amenable number.
228145193 is a deficient number, since it is larger than the sum of its proper divisors (1).
228145193 is an equidigital number, since it uses as much as digits as its factorization.
228145193 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 17280, while the sum is 35.
The square root of 228145193 is about 15104.4759260293.
The cubic root of 228145193 is about 611.0411253763.
The spelling of 228145193 in words is "two hundred twenty-eight million, one hundred forty-five thousand, one hundred ninety-three".