225005240 has 32 divisors (see below), whose sum is σ = 518039280. Its totient is φ = 87908352.

The previous prime is 225005237. The next prime is 225005257. The reversal of 225005240 is 42500522.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 63689 + ... + 67128.

Almost surely, 2^225005240 is an apocalyptic number.

225005240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225005240 is an abundant number, since it is smaller than the sum of its proper divisors (293034040).

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

225005240 is a wasteful number, since it uses less digits than its factorization.

225005240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130871 (or 130867 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 225005240 is about 15000.1746656497. The cubic root of 225005240 is about 608.2249211116.

Adding to 225005240 its reverse (42500522), we get a palindrome (267505762).

The spelling of 225005240 in words is "two hundred twenty-five million, five thousand, two hundred forty".