404413221 has 16 divisors (see below), whose sum is σ = 571363200. Its totient is φ = 253559808.

The previous prime is 404413213. The next prime is 404413253. The reversal of 404413221 is 122314404.

It is not a de Polignac number, because 404413221 - 2³ = 404413213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404453221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102045 + ... + 105933.

It is an arithmetic number, because the mean of its divisors is an integer number (35710200).

Almost surely, 2^404413221 is an apocalyptic number.

It is an amenable number.

404413221 is a deficient number, since it is larger than the sum of its proper divisors (166949979).

404413221 is a wasteful number, since it uses less digits than its factorization.

404413221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5948.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 404413221 is about 20110.0278716863. The cubic root of 404413221 is about 739.5061356574.

Adding to 404413221 its reverse (122314404), we get a palindrome (526727625).

The spelling of 404413221 in words is "four hundred four million, four hundred thirteen thousand, two hundred twenty-one".