228165211 has 12 divisors (see below), whose sum is σ = 242922960. Its totient is φ = 214259840.

The previous prime is 228165209. The next prime is 228165229. The reversal of 228165211 is 112561822.

It is not a de Polignac number, because 228165211 - 2¹ = 228165209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 228165211.

It is not an unprimeable number, because it can be changed into a prime (228165271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 242001 + ... + 242941.

It is an arithmetic number, because the mean of its divisors is an integer number (20243580).

Almost surely, 2^228165211 is an apocalyptic number.

228165211 is a deficient number, since it is larger than the sum of its proper divisors (14757749).

228165211 is an equidigital number, since it uses as much as digits as its factorization.

228165211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1814 (or 1797 counting only the distinct ones).

The product of its digits is 1920, while the sum is 28.

The square root of 228165211 is about 15105.1385627541. The cubic root of 228165211 is about 611.0589962525.

The spelling of 228165211 in words is "two hundred twenty-eight million, one hundred sixty-five thousand, two hundred eleven".