228685169 has 4 divisors (see below), whose sum is σ = 231440496. Its totient is φ = 225929844.

The previous prime is 228685153. The next prime is 228685183. The reversal of 228685169 is 961586822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 228685169 - 2⁴ = 228685153 is a prime.

It is a super-2 number, since 2×228685169² = 104593813041117122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228685199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1377539 + ... + 1377704.

It is an arithmetic number, because the mean of its divisors is an integer number (57860124).

Almost surely, 2^228685169 is an apocalyptic number.

It is an amenable number.

228685169 is a deficient number, since it is larger than the sum of its proper divisors (2755327).

228685169 is an equidigital number, since it uses as much as digits as its factorization.

228685169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2755326.

The product of its digits is 414720, while the sum is 47.

The square root of 228685169 is about 15122.3400636277. The cubic root of 228685169 is about 611.5228180103.

The spelling of 228685169 in words is "two hundred twenty-eight million, six hundred eighty-five thousand, one hundred sixty-nine".