233161221 has 8 divisors (see below), whose sum is σ = 314375040. Its totient is φ = 153694112.

The previous prime is 233161213. The next prime is 233161249. The reversal of 233161221 is 122161332.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 233161221 - 2³ = 233161213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233161121) 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 7 ways as a sum of consecutive naturals, for example, 436365 + ... + 436898.

It is an arithmetic number, because the mean of its divisors is an integer number (39296880).

Almost surely, 2^233161221 is an apocalyptic number.

It is an amenable number.

233161221 is a deficient number, since it is larger than the sum of its proper divisors (81213819).

233161221 is an equidigital number, since it uses as much as digits as its factorization.

233161221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873355.

The product of its digits is 432, while the sum is 21.

The square root of 233161221 is about 15269.6175787084. The cubic root of 233161221 is about 615.4868430078.

The spelling of 233161221 in words is "two hundred thirty-three million, one hundred sixty-one thousand, two hundred twenty-one".