225665312424 has 64 divisors (see below), whose sum is σ = 570625568640. Its totient is φ = 74362425600.

The previous prime is 225665312423. The next prime is 225665312443. The reversal of 225665312424 is 424213566522.

It is not an unprimeable number, because it can be changed into a prime (225665312423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1511589 + ... + 1654155.

It is an arithmetic number, because the mean of its divisors is an integer number (8916024510).

Almost surely, 2^225665312424 is an apocalyptic number.

225665312424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

225665312424 is an abundant number, since it is smaller than the sum of its proper divisors (344960256216).

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

225665312424 is a wasteful number, since it uses less digits than its factorization.

225665312424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143330 (or 143326 counting only the distinct ones).

The product of its digits is 691200, while the sum is 42.

Adding to 225665312424 its reverse (424213566522), we get a palindrome (649878878946).

The spelling of 225665312424 in words is "two hundred twenty-five billion, six hundred sixty-five million, three hundred twelve thousand, four hundred twenty-four".