233681161 has 4 divisors (see below), whose sum is σ = 267064192. Its totient is φ = 200298132.

The previous prime is 233681153. The next prime is 233681191. The reversal of 233681161 is 161186332.

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 a cyclic number.

It is not a de Polignac number, because 233681161 - 2³ = 233681153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (233681111) 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, 16691505 + ... + 16691518.

It is an arithmetic number, because the mean of its divisors is an integer number (66766048).

Almost surely, 2^233681161 is an apocalyptic number.

It is an amenable number.

233681161 is a deficient number, since it is larger than the sum of its proper divisors (33383031).

233681161 is an equidigital number, since it uses as much as digits as its factorization.

233681161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33383030.

The product of its digits is 5184, while the sum is 31.

The square root of 233681161 is about 15286.6334096164. The cubic root of 233681161 is about 615.9440068644.

The spelling of 233681161 in words is "two hundred thirty-three million, six hundred eighty-one thousand, one hundred sixty-one".