225521936802 has 42 divisors (see below), whose sum is σ = 507233123553. Its totient is φ = 75167934552.

The previous prime is 225521936789. The next prime is 225521936867. The reversal of 225521936802 is 208639125522.

225521936802 is a `hidden beast` number, since 2 + 2 + 552 + 1 + 93 + 6 + 8 + 0 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 154691969481 + 70829967321 = 393309^2 + 266139^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=335799.

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 18126928 + ... + 18139364.

Almost surely, 2^225521936802 is an apocalyptic number.

225521936802 is an abundant number, since it is smaller than the sum of its proper divisors (281711186751).

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

225521936802 is an frugal number, since it uses more digits than its factorization.

225521936802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24894 (or 12442 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 225521936802 in words is "two hundred twenty-five billion, five hundred twenty-one million, nine hundred thirty-six thousand, eight hundred two".