173320228 has 6 divisors (see below), whose sum is σ = 303310406. Its totient is φ = 86660112.

The previous prime is 173320201. The next prime is 173320241. The reversal of 173320228 is 822023371.

It can be written as a sum of positive squares in only one way, i.e., 171034084 + 2286144 = 13078^2 + 1512^2 .

It is a junction number, because it is equal to n+sod(n) for n = 173320196 and 173320205.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21665025 + ... + 21665032.

Almost surely, 2^173320228 is an apocalyptic number.

It is an amenable number.

173320228 is a deficient number, since it is larger than the sum of its proper divisors (129990178).

173320228 is a wasteful number, since it uses less digits than its factorization.

173320228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43330061 (or 43330059 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 173320228 is about 13165.1140519177. The cubic root of 173320228 is about 557.5490547838.

Adding to 173320228 its reverse (822023371), we get a palindrome (995343599).

The spelling of 173320228 in words is "one hundred seventy-three million, three hundred twenty thousand, two hundred twenty-eight".