225344440 has 32 divisors (see below), whose sum is σ = 512730000. Its totient is φ = 89123584.

The previous prime is 225344429. The next prime is 225344443. The reversal of 225344440 is 44443522.

It is a junction number, because it is equal to n+sod(n) for n = 225344399 and 225344408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225344443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28090 + ... + 35209.

Almost surely, 2^225344440 is an apocalyptic number.

225344440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225344440 is an abundant number, since it is smaller than the sum of its proper divisors (287385560).

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

225344440 is a wasteful number, since it uses less digits than its factorization.

225344440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63399 (or 63395 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 28.

The square root of 225344440 is about 15011.4769426596. The cubic root of 225344440 is about 608.5304048236.

Adding to 225344440 its reverse (44443522), we get a palindrome (269787962).

The spelling of 225344440 in words is "two hundred twenty-five million, three hundred forty-four thousand, four hundred forty".