204016161 has 4 divisors (see below), whose sum is σ = 272021552. Its totient is φ = 136010772.

The previous prime is 204016121. The next prime is 204016181. The reversal of 204016161 is 161610402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 204016161 - 2⁶ = 204016097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204016121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34002691 + ... + 34002696.

It is an arithmetic number, because the mean of its divisors is an integer number (68005388).

Almost surely, 2^204016161 is an apocalyptic number.

It is an amenable number.

204016161 is a deficient number, since it is larger than the sum of its proper divisors (68005391).

204016161 is an equidigital number, since it uses as much as digits as its factorization.

204016161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68005390.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 204016161 is about 14283.4225940424. The cubic root of 204016161 is about 588.6920763782.

Adding to 204016161 its reverse (161610402), we get a palindrome (365626563).

It can be divided in two parts, 20401 and 6161, that added together give a palindrome (26562).

The spelling of 204016161 in words is "two hundred four million, sixteen thousand, one hundred sixty-one".