304112161 has 4 divisors (see below), whose sum is σ = 304147732. Its totient is φ = 304076592.

The previous prime is 304112153. The next prime is 304112173. The reversal of 304112161 is 161211403.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 161211403 = 2371 ⋅67993.

It can be written as a sum of positive squares in 2 ways, for example, as 6031936 + 298080225 = 2456^2 + 17265^2 .

It is a cyclic number.

It is not a de Polignac number, because 304112161 - 2³ = 304112153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (304112191) 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, 3655 + ... + 24931.

It is an arithmetic number, because the mean of its divisors is an integer number (76036933).

Almost surely, 2^304112161 is an apocalyptic number.

It is an amenable number.

304112161 is a deficient number, since it is larger than the sum of its proper divisors (35571).

304112161 is a wasteful number, since it uses less digits than its factorization.

304112161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35570.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 304112161 is about 17438.8119148066. The cubic root of 304112161 is about 672.4777647278.

Adding to 304112161 its reverse (161211403), we get a palindrome (465323564).

The spelling of 304112161 in words is "three hundred four million, one hundred twelve thousand, one hundred sixty-one".