404033221 has 4 divisors (see below), whose sum is σ = 404078944. Its totient is φ = 403987500.

The previous prime is 404033171. The next prime is 404033263. The reversal of 404033221 is 122330404.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 404033221 - 2⁷ = 404033093 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 (404033521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4905 + ... + 28846.

It is an arithmetic number, because the mean of its divisors is an integer number (101019736).

Almost surely, 2^404033221 is an apocalyptic number.

It is an amenable number.

404033221 is a deficient number, since it is larger than the sum of its proper divisors (45723).

404033221 is a wasteful number, since it uses less digits than its factorization.

404033221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45722.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 404033221 is about 20100.5776285161. The cubic root of 404033221 is about 739.2744416218.

Adding to 404033221 its reverse (122330404), we get a palindrome (526363625).

The spelling of 404033221 in words is "four hundred four million, thirty-three thousand, two hundred twenty-one".