233664161 has 4 divisors (see below), whose sum is σ = 234018324. Its totient is φ = 233310000.

The previous prime is 233664157. The next prime is 233664163. The reversal of 233664161 is 161466332.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 180096400 + 53567761 = 13420^2 + 7319^2 .

It is a cyclic number.

It is not a de Polignac number, because 233664161 - 2² = 233664157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (233664163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176090 + ... + 177411.

It is an arithmetic number, because the mean of its divisors is an integer number (58504581).

Almost surely, 2^233664161 is an apocalyptic number.

It is an amenable number.

233664161 is a deficient number, since it is larger than the sum of its proper divisors (354163).

233664161 is an equidigital number, since it uses as much as digits as its factorization.

233664161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354162.

The product of its digits is 15552, while the sum is 32.

The square root of 233664161 is about 15286.0773581714. The cubic root of 233664161 is about 615.9290701276.

The spelling of 233664161 in words is "two hundred thirty-three million, six hundred sixty-four thousand, one hundred sixty-one".