225204565440 has 56 divisors (see below), whose sum is σ = 715024498320. Its totient is φ = 60054550528.

The previous prime is 225204565433. The next prime is 225204565441. The reversal of 225204565440 is 44565402522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225204565441) 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, 117293085 + ... + 117295004.

Almost surely, 2^225204565440 is an apocalyptic number.

225204565440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225204565440 is an abundant number, since it is smaller than the sum of its proper divisors (489819932880).

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

225204565440 is a wasteful number, since it uses less digits than its factorization.

225204565440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234588109 (or 234588099 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 39.

Adding to 225204565440 its reverse (44565402522), we get a palindrome (269769967962).

The spelling of 225204565440 in words is "two hundred twenty-five billion, two hundred four million, five hundred sixty-five thousand, four hundred forty".