234631221 has 24 divisors (see below), whose sum is σ = 344723232. Its totient is φ = 141847200.

The previous prime is 234631217. The next prime is 234631223. The reversal of 234631221 is 122136432.

It is not a de Polignac number, because 234631221 - 2² = 234631217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 234631191 and 234631200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (234631223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 288906 + ... + 289716.

It is an arithmetic number, because the mean of its divisors is an integer number (14363468).

Almost surely, 2^234631221 is an apocalyptic number.

It is an amenable number.

234631221 is a deficient number, since it is larger than the sum of its proper divisors (110092011).

234631221 is a wasteful number, since it uses less digits than its factorization.

234631221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633 (or 1622 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

The square root of 234631221 is about 15317.6767494291. The cubic root of 234631221 is about 616.7776106534. Note that the first 3 decimals are identical.

Adding to 234631221 its reverse (122136432), we get a palindrome (356767653).

The spelling of 234631221 in words is "two hundred thirty-four million, six hundred thirty-one thousand, two hundred twenty-one".