204231320166 has 16 divisors (see below), whose sum is σ = 409019896944. Its totient is φ = 67984230624.

The previous prime is 204231320113. The next prime is 204231320177. The reversal of 204231320166 is 661023132402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23214261 + ... + 23223056.

It is an arithmetic number, because the mean of its divisors is an integer number (25563743559).

Almost surely, 2^204231320166 is an apocalyptic number.

204231320166 is an abundant number, since it is smaller than the sum of its proper divisors (204788576778).

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

204231320166 is a wasteful number, since it uses less digits than its factorization.

204231320166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46438055.

The product of its (nonzero) digits is 10368, while the sum is 30.

Adding to 204231320166 its reverse (661023132402), we get a palindrome (865254452568).

The spelling of 204231320166 in words is "two hundred four billion, two hundred thirty-one million, three hundred twenty thousand, one hundred sixty-six".