228228205 has 8 divisors (see below), whose sum is σ = 275011704. Its totient is φ = 181824000.

The previous prime is 228228191. The next prime is 228228223. The reversal of 228228205 is 502822822.

It can be written as a sum of positive squares in 4 ways, for example, as 9572836 + 218655369 = 3094^2 + 14787^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-228228205 is a prime.

It is a super-2 number, since 2×228228205² = 104176227115044050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 93496 + ... + 95905.

It is an arithmetic number, because the mean of its divisors is an integer number (34376463).

Almost surely, 2^228228205 is an apocalyptic number.

It is an amenable number.

228228205 is a deficient number, since it is larger than the sum of its proper divisors (46783499).

228228205 is a wasteful number, since it uses less digits than its factorization.

228228205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189647.

The product of its (nonzero) digits is 10240, while the sum is 31.

The square root of 228228205 is about 15107.2236032965. The cubic root of 228228205 is about 611.1152267185.

The spelling of 228228205 in words is "two hundred twenty-eight million, two hundred twenty-eight thousand, two hundred five".