233405221 has 8 divisors (see below), whose sum is σ = 266841920. Its totient is φ = 199991808.

The previous prime is 233405209. The next prime is 233405261. The reversal of 233405221 is 122504332.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-233405221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 233405192 and 233405201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233405201) 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 7 ways as a sum of consecutive naturals, for example, 32485 + ... + 39013.

It is an arithmetic number, because the mean of its divisors is an integer number (33355240).

Almost surely, 2^233405221 is an apocalyptic number.

It is an amenable number.

233405221 is a deficient number, since it is larger than the sum of its proper divisors (33436699).

233405221 is an equidigital number, since it uses as much as digits as its factorization.

233405221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11643.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 233405221 is about 15277.6052115507. The cubic root of 233405221 is about 615.7014676537.

Adding to 233405221 its reverse (122504332), we get a palindrome (355909553).

It can be divided in two parts, 23340 and 5221, that added together give a 4-th power (28561 = 13⁴).

The spelling of 233405221 in words is "two hundred thirty-three million, four hundred five thousand, two hundred twenty-one".