228145 has 8 divisors (see below), whose sum is σ = 277056. Its totient is φ = 180336.

The previous prime is 228139. The next prime is 228181. The reversal of 228145 is 541822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 228145 - 2⁵ = 228113 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 294 + ... + 736.

It is an arithmetic number, because the mean of its divisors is an integer number (34632).

2²²⁸¹⁴⁵ is an apocalyptic number.

It is an amenable number.

228145 is a deficient number, since it is larger than the sum of its proper divisors (48911).

228145 is a wasteful number, since it uses less digits than its factorization.

228145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551.

The product of its digits is 640, while the sum is 22.

The square root of 228145 is about 477.6452658616. The cubic root of 228145 is about 61.1040953072.

Adding to 228145 its reverse (541822), we get a palindrome (769967).

It can be divided in two parts, 228 and 145, that added together give a palindrome (373).

The spelling of 228145 in words is "two hundred twenty-eight thousand, one hundred forty-five".