228175 has 6 divisors (see below), whose sum is σ = 282968. Its totient is φ = 182520.

The previous prime is 228139. The next prime is 228181. The reversal of 228175 is 571822.

It is not a de Polignac number, because 228175 - 2⁹ = 227663 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 9127 = 228175 / (2 + 2 + 8 + 1 + 7 + 5).

It is a Duffinian number.

228175 is a lucky number.

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 5 ways as a sum of consecutive naturals, for example, 4539 + ... + 4588.

2²²⁸¹⁷⁵ is an apocalyptic number.

228175 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

228175 is a deficient number, since it is larger than the sum of its proper divisors (54793).

228175 is an equidigital number, since it uses as much as digits as its factorization.

228175 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9137 (or 9132 counting only the distinct ones).

The product of its digits is 1120, while the sum is 25.

The square root of 228175 is about 477.6766688881. The cubic root of 228175 is about 61.1067734907.

Subtracting from 228175 its sum of digits (25), we obtain a triangular number (228150 = T₆₇₅).

Adding to 228175 its reverse (571822), we get a palindrome (799997).

It can be divided in two parts, 22817 and 5, that added together give a palindrome (22822).

The spelling of 228175 in words is "two hundred twenty-eight thousand, one hundred seventy-five".