323561161 has 20 divisors (see below), whose sum is σ = 411814224. Its totient is φ = 252105000.

The previous prime is 323561137. The next prime is 323561179. The reversal of 323561161 is 161165323.

It is not a de Polignac number, because 323561161 - 2¹⁷ = 323430089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (323561261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 20286 + ... + 32536.

Almost surely, 2^323561161 is an apocalyptic number.

It is an amenable number.

323561161 is a deficient number, since it is larger than the sum of its proper divisors (88253063).

323561161 is an equidigital number, since it uses as much as digits as its factorization.

323561161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12290 (or 12269 counting only the distinct ones).

The product of its digits is 3240, while the sum is 28.

The square root of 323561161 is about 17987.8058973294. The cubic root of 323561161 is about 686.5183157645.

The spelling of 323561161 in words is "three hundred twenty-three million, five hundred sixty-one thousand, one hundred sixty-one".