228181169 has 2 divisors, whose sum is σ = 228181170. Its totient is φ = 228181168.

The previous prime is 228181159. The next prime is 228181181. The reversal of 228181169 is 961181822.

228181169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177955600 + 50225569 = 13340^2 + 7087^2 .

It is a cyclic number.

It is not a de Polignac number, because 228181169 - 2⁸ = 228180913 is a prime.

It is a super-2 number, since 2×228181169² = 104133291772413122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (228181159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114090584 + 114090585.

It is an arithmetic number, because the mean of its divisors is an integer number (114090585).

Almost surely, 2^228181169 is an apocalyptic number.

It is an amenable number.

228181169 is a deficient number, since it is larger than the sum of its proper divisors (1).

228181169 is an equidigital number, since it uses as much as digits as its factorization.

228181169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 38.

The square root of 228181169 is about 15105.6667843561. Note that the first 3 decimals coincide. The cubic root of 228181169 is about 611.0732418542.

The spelling of 228181169 in words is "two hundred twenty-eight million, one hundred eighty-one thousand, one hundred sixty-nine".