225171238 has 4 divisors (see below), whose sum is σ = 337756860. Its totient is φ = 112585618.

The previous prime is 225171229. The next prime is 225171257. The reversal of 225171238 is 832171522.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56292808 + ... + 56292811.

It is an arithmetic number, because the mean of its divisors is an integer number (84439215).

Almost surely, 2^225171238 is an apocalyptic number.

225171238 is a deficient number, since it is larger than the sum of its proper divisors (112585622).

225171238 is a wasteful number, since it uses less digits than its factorization.

225171238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112585621.

The product of its digits is 6720, while the sum is 31.

The square root of 225171238 is about 15005.7068477296. The cubic root of 225171238 is about 608.3744573354.

The spelling of 225171238 in words is "two hundred twenty-five million, one hundred seventy-one thousand, two hundred thirty-eight".