225325872818 has 6 divisors (see below), whose sum is σ = 337989816189. Its totient is φ = 112662600756.

The previous prime is 225325872809. The next prime is 225325872823. The reversal of 225325872818 is 818278523522.

It can be written as a sum of positive squares in 2 ways, for example, as 224123655889 + 1202216929 = 473417^2 + 34673^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=335653.

It is a super-2 number, since 2×225325872818² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 225325872818.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 503480 + ... + 839132.

Almost surely, 2^225325872818 is an apocalyptic number.

225325872818 is a deficient number, since it is larger than the sum of its proper divisors (112663943371).

225325872818 is an frugal number, since it uses more digits than its factorization.

225325872818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671308 (or 335655 counting only the distinct ones).

The product of its digits is 4300800, while the sum is 53.

The spelling of 225325872818 in words is "two hundred twenty-five billion, three hundred twenty-five million, eight hundred seventy-two thousand, eight hundred eighteen".