228161205 has 24 divisors (see below), whose sum is σ = 410128992. Its totient is φ = 121685328.

The previous prime is 228161191. The next prime is 228161221. The reversal of 228161205 is 502161822.

It is a happy number.

It is not a de Polignac number, because 228161205 - 2⁴ = 228161189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 23 ways as a sum of consecutive naturals, for example, 92679 + ... + 95108.

It is an arithmetic number, because the mean of its divisors is an integer number (17088708).

Almost surely, 2^228161205 is an apocalyptic number.

It is an amenable number.

228161205 is a deficient number, since it is larger than the sum of its proper divisors (181967787).

228161205 is an equidigital number, since it uses as much as digits as its factorization.

228161205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187807 (or 187795 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 228161205 is about 15105.0059582908. The cubic root of 228161205 is about 611.0554200183.

The spelling of 228161205 in words is "two hundred twenty-eight million, one hundred sixty-one thousand, two hundred five".