225532240 has 20 divisors (see below), whose sum is σ = 524362644. Its totient is φ = 90212864.

The previous prime is 225532193. The next prime is 225532271. The reversal of 225532240 is 42235522.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 84492864 + 141039376 = 9192^2 + 11876^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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 3 ways as a sum of consecutive naturals, for example, 1409497 + ... + 1409656.

Almost surely, 2^225532240 is an apocalyptic number.

225532240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225532240 is an abundant number, since it is smaller than the sum of its proper divisors (298830404).

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

225532240 is a wasteful number, since it uses less digits than its factorization.

225532240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2819166 (or 2819160 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 225532240 is about 15017.7308538940. The cubic root of 225532240 is about 608.6994057799.

Adding to 225532240 its reverse (42235522), we get a palindrome (267767762).

The spelling of 225532240 in words is "two hundred twenty-five million, five hundred thirty-two thousand, two hundred forty".