228145135 has 4 divisors (see below), whose sum is σ = 273774168.
Its totient is φ = 182516104.
The previous prime is 228145123. The next prime is 228145187. The reversal of 228145135 is 531541822.
Adding to 228145135 its reverse (531541822), we get a palindrome (759686957).
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is not a de Polignac number, because 228145135 - 217 = 228014063 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 228145097 and 228145106.
It is a congruent number.
It is an unprimeable number.
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 in 3 ways as a sum of consecutive naturals, for example, 22814509 + ... + 22814518.
It is an arithmetic number, because the mean of its divisors is an integer number (68443542).
Almost surely, 2228145135 is an apocalyptic number.
228145135 is a deficient number, since it is larger than the sum of its proper divisors (45629033).
228145135 is an equidigital number, since it uses as much as digits as its factorization.
228145135 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 45629032.
The product of its digits is 9600, while the sum is 31.
The square root of 228145135 is about 15104.4740060685.
The cubic root of 228145135 is about 611.0410735958.
The spelling of 228145135 in words is "two hundred twenty-eight million, one hundred forty-five thousand, one hundred thirty-five".