404334221 has 4 divisors (see below), whose sum is σ = 406755552. Its totient is φ = 401912892.

The previous prime is 404334197. The next prime is 404334241. The reversal of 404334221 is 122433404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 404334221 - 2⁶ = 404334157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404334241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1210415 + ... + 1210748.

It is an arithmetic number, because the mean of its divisors is an integer number (101688888).

Almost surely, 2^404334221 is an apocalyptic number.

It is an amenable number.

404334221 is a deficient number, since it is larger than the sum of its proper divisors (2421331).

404334221 is a wasteful number, since it uses less digits than its factorization.

404334221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2421330.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 404334221 is about 20108.0635815585. The cubic root of 404334221 is about 739.4579796410.

Adding to 404334221 its reverse (122433404), we get a palindrome (526767625).

The spelling of 404334221 in words is "four hundred four million, three hundred thirty-four thousand, two hundred twenty-one".