225642218838 has 8 divisors (see below), whose sum is σ = 451284437688. Its totient is φ = 75214072944.

The previous prime is 225642218797. The next prime is 225642218861. The reversal of 225642218838 is 838812246522.

225642218838 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

225642218838 is an admirable number.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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, 18803518231 + ... + 18803518242.

It is an arithmetic number, because the mean of its divisors is an integer number (56410554711).

Almost surely, 2^225642218838 is an apocalyptic number.

225642218838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

225642218838 is a wasteful number, since it uses less digits than its factorization.

225642218838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37607036478.

The product of its digits is 2949120, while the sum is 51.

The spelling of 225642218838 in words is "two hundred twenty-five billion, six hundred forty-two million, two hundred eighteen thousand, eight hundred thirty-eight".