232990221 has 16 divisors (see below), whose sum is σ = 320220224. Its totient is φ = 150574464.

The previous prime is 232990201. The next prime is 232990267. The reversal of 232990221 is 122099232.

It is a happy number.

232990221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 232990221 - 2⁶ = 232990157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232990201) 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, 27705 + ... + 35121.

It is an arithmetic number, because the mean of its divisors is an integer number (20013764).

Almost surely, 2^232990221 is an apocalyptic number.

It is an amenable number.

232990221 is a deficient number, since it is larger than the sum of its proper divisors (87230003).

232990221 is a wasteful number, since it uses less digits than its factorization.

232990221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7740.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 232990221 is about 15264.0171973174. The cubic root of 232990221 is about 615.3363405789.

The spelling of 232990221 in words is "two hundred thirty-two million, nine hundred ninety thousand, two hundred twenty-one".