198331161 has 16 divisors (see below), whose sum is σ = 303744000. Its totient is φ = 112760208.

The previous prime is 198331151. The next prime is 198331171. The reversal of 198331161 is 161133891.

It is a happy number.

198331161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (198331151) and next prime (198331171).

It is not a de Polignac number, because 198331161 - 2⁶ = 198331097 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (198331121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19551 + ... + 27908.

It is an arithmetic number, because the mean of its divisors is an integer number (18984000).

Almost surely, 2^198331161 is an apocalyptic number.

It is an amenable number.

198331161 is a deficient number, since it is larger than the sum of its proper divisors (105412839).

198331161 is a wasteful number, since it uses less digits than its factorization.

198331161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47668.

The product of its digits is 3888, while the sum is 33.

The square root of 198331161 is about 14083.0096570300. The cubic root of 198331161 is about 583.1724307965.

The spelling of 198331161 in words is "one hundred ninety-eight million, three hundred thirty-one thousand, one hundred sixty-one".