404233221 has 8 divisors (see below), whose sum is σ = 615974464. Its totient is φ = 230990400.

The previous prime is 404233213. The next prime is 404233223. The reversal of 404233221 is 122332404.

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

It is not a de Polignac number, because 404233221 - 2³ = 404233213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 19249201 = 404233221 / (4 + 0 + 4 + 2 + 3 + 3 + 2 + 2 + 1).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404233223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9624580 + ... + 9624621.

It is an arithmetic number, because the mean of its divisors is an integer number (76996808).

Almost surely, 2^404233221 is an apocalyptic number.

It is an amenable number.

404233221 is a deficient number, since it is larger than the sum of its proper divisors (211741243).

404233221 is a wasteful number, since it uses less digits than its factorization.

404233221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19249211.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 404233221 is about 20105.5519944119. The cubic root of 404233221 is about 739.3964039514.

Adding to 404233221 its reverse (122332404), we get a palindrome (526565625).

The spelling of 404233221 in words is "four hundred four million, two hundred thirty-three thousand, two hundred twenty-one".