204221215044 has 72 divisors (see below), whose sum is σ = 643606262208. Its totient is φ = 53044470720.

The previous prime is 204221215021. The next prime is 204221215073. The reversal of 204221215044 is 440512122402.

It is a happy number.

204221215044 is a `hidden beast` number, since 20 + 422 + 1 + 215 + 0 + 4 + 4 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 204221214999 and 204221215017.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36833667 + ... + 36839210.

It is an arithmetic number, because the mean of its divisors is an integer number (8938975864).

Almost surely, 2^204221215044 is an apocalyptic number.

It is an amenable number.

204221215044 is an abundant number, since it is smaller than the sum of its proper divisors (439385047164).

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

204221215044 is a wasteful number, since it uses less digits than its factorization.

204221215044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73672905 (or 73672900 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

Adding to 204221215044 its reverse (440512122402), we get a palindrome (644733337446).

The spelling of 204221215044 in words is "two hundred four billion, two hundred twenty-one million, two hundred fifteen thousand, forty-four".