225212432 has 20 divisors (see below), whose sum is σ = 436986540. Its totient is φ = 112441728.

The previous prime is 225212417. The next prime is 225212443. The reversal of 225212432 is 234212522.

It can be written as a sum of positive squares in 2 ways, for example, as 33223696 + 191988736 = 5764^2 + 13856^2 .

It is a junction number, because it is equal to n+sod(n) for n = 225212398 and 225212407.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1418 + ... + 21270.

It is an arithmetic number, because the mean of its divisors is an integer number (21849327).

Almost surely, 2^225212432 is an apocalyptic number.

It is an amenable number.

225212432 is a deficient number, since it is larger than the sum of its proper divisors (211774108).

225212432 is a wasteful number, since it uses less digits than its factorization.

225212432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20570 (or 20564 counting only the distinct ones).

The product of its digits is 1920, while the sum is 23.

The square root of 225212432 is about 15007.0793960717. The cubic root of 225212432 is about 608.4115548047.

Adding to 225212432 its reverse (234212522), we get a palindrome (459424954).

The spelling of 225212432 in words is "two hundred twenty-five million, two hundred twelve thousand, four hundred thirty-two".