228165172 has 12 divisors (see below), whose sum is σ = 399534660. Its totient is φ = 114012416.

The previous prime is 228165169. The next prime is 228165209. The reversal of 228165172 is 271561822.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 103306896 + 124858276 = 10164^2 + 11174^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9853 + ... + 23524.

It is an arithmetic number, because the mean of its divisors is an integer number (33294555).

Almost surely, 2^228165172 is an apocalyptic number.

It is an amenable number.

228165172 is a deficient number, since it is larger than the sum of its proper divisors (171369488).

228165172 is a wasteful number, since it uses less digits than its factorization.

228165172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35090 (or 35088 counting only the distinct ones).

The product of its digits is 13440, while the sum is 34.

The square root of 228165172 is about 15105.1372718026. The cubic root of 228165172 is about 611.0589614366.

The spelling of 228165172 in words is "two hundred twenty-eight million, one hundred sixty-five thousand, one hundred seventy-two".