228145169 has 8 divisors (see below), whose sum is σ = 260984640. Its totient is φ = 195367536.

The previous prime is 228145123. The next prime is 228145187. The reversal of 228145169 is 961541822.

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-228145169 is a prime.

It is a super-2 number, since 2×228145169² = 104100436276077122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (228145469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7259 + ... + 22560.

It is an arithmetic number, because the mean of its divisors is an integer number (32623080).

Almost surely, 2^228145169 is an apocalyptic number.

It is an amenable number.

228145169 is a deficient number, since it is larger than the sum of its proper divisors (32839471).

228145169 is a wasteful number, since it uses less digits than its factorization.

228145169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30919.

The product of its digits is 34560, while the sum is 38.

The square root of 228145169 is about 15104.4751315628. The cubic root of 228145169 is about 611.0411039499.

The spelling of 228145169 in words is "two hundred twenty-eight million, one hundred forty-five thousand, one hundred sixty-nine".