225220435212 has 24 divisors (see below), whose sum is σ = 525749330736. Its totient is φ = 75039909568.

The previous prime is 225220435183. The next prime is 225220435213. The reversal of 225220435212 is 212534022522.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 225220435212.

It is not an unprimeable number, because it can be changed into a prime (225220435213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4168143 + ... + 4221830.

It is an arithmetic number, because the mean of its divisors is an integer number (21906222114).

Almost surely, 2^225220435212 is an apocalyptic number.

It is an amenable number.

225220435212 is an abundant number, since it is smaller than the sum of its proper divisors (300528895524).

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

225220435212 is a wasteful number, since it uses less digits than its factorization.

225220435212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8392217 (or 8392215 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 225220435212 its reverse (212534022522), we get a palindrome (437754457734).

The spelling of 225220435212 in words is "two hundred twenty-five billion, two hundred twenty million, four hundred thirty-five thousand, two hundred twelve".