225188238 has 16 divisors (see below), whose sum is σ = 491319936. Its totient is φ = 68238840.

The previous prime is 225188203. The next prime is 225188261. The reversal of 225188238 is 832881522.

It is a happy number.

225188238 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 225188196 and 225188205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1705906 + ... + 1706037.

It is an arithmetic number, because the mean of its divisors is an integer number (30707496).

Almost surely, 2^225188238 is an apocalyptic number.

225188238 is an abundant number, since it is smaller than the sum of its proper divisors (266131698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225188238 is a wasteful number, since it uses less digits than its factorization.

225188238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3411959.

The product of its digits is 61440, while the sum is 39.

The square root of 225188238 is about 15006.2732881952. The cubic root of 225188238 is about 608.3897673214.

The spelling of 225188238 in words is "two hundred twenty-five million, one hundred eighty-eight thousand, two hundred thirty-eight".