225297198 has 72 divisors (see below), whose sum is σ = 571808952. Its totient is φ = 63921312.

The previous prime is 225297197. The next prime is 225297203. The reversal of 225297198 is 891792522.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225297197) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 137661 + ... + 139287.

It is an arithmetic number, because the mean of its divisors is an integer number (7941791).

Almost surely, 2^225297198 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225297198, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (285904476).

225297198 is an abundant number, since it is smaller than the sum of its proper divisors (346511754).

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

225297198 is a wasteful number, since it uses less digits than its factorization.

225297198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1806 (or 1796 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 225297198 is about 15009.9033308013. The cubic root of 225297198 is about 608.4878770344.

The spelling of 225297198 in words is "two hundred twenty-five million, two hundred ninety-seven thousand, one hundred ninety-eight".