232312221 has 24 divisors (see below), whose sum is σ = 356747040. Its totient is φ = 145260000.

The previous prime is 232312189. The next prime is 232312237. The reversal of 232312221 is 122213232.

It is not a de Polignac number, because 232312221 - 2⁵ = 232312189 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 232312194 and 232312203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232312261) 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 23 ways as a sum of consecutive naturals, for example, 10546 + ... + 23996.

It is an arithmetic number, because the mean of its divisors is an integer number (14864460).

Almost surely, 2^232312221 is an apocalyptic number.

It is an amenable number.

232312221 is a deficient number, since it is larger than the sum of its proper divisors (124434819).

232312221 is a wasteful number, since it uses less digits than its factorization.

232312221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13577 (or 13574 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 232312221 is about 15241.7919222118. The cubic root of 232312221 is about 614.7388857819.

Adding to 232312221 its reverse (122213232), we get a palindrome (354525453).

It can be divided in two parts, 23231 and 2221, that added together give a palindrome (25452).

The spelling of 232312221 in words is "two hundred thirty-two million, three hundred twelve thousand, two hundred twenty-one".