225243240 has 64 divisors (see below), whose sum is σ = 685272960. Its totient is φ = 59216640.

The previous prime is 225243229. The next prime is 225243257. The reversal of 225243240 is 42342522.

It is a happy number.

225243240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 225243240.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4699 + ... + 21738.

It is an arithmetic number, because the mean of its divisors is an integer number (10707390).

Almost surely, 2^225243240 is an apocalyptic number.

225243240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225243240 is an abundant number, since it is smaller than the sum of its proper divisors (460029720).

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

225243240 is a wasteful number, since it uses less digits than its factorization.

225243240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26522 (or 26518 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 225243240 is about 15008.1058098615. The cubic root of 225243240 is about 608.4392961515.

Adding to 225243240 its reverse (42342522), we get a palindrome (267585762).

The spelling of 225243240 in words is "two hundred twenty-five million, two hundred forty-three thousand, two hundred forty".