404220402217 has 4 divisors (see below), whose sum is σ = 404221752720. Its totient is φ = 404219051716.

The previous prime is 404220402191. The next prime is 404220402221. The reversal of 404220402217 is 712204022404.

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 404220402217 - 2¹¹ = 404220400169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404220402227) 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, 3583 + ... + 899140.

It is an arithmetic number, because the mean of its divisors is an integer number (101055438180).

Almost surely, 2^404220402217 is an apocalyptic number.

It is an amenable number.

404220402217 is a deficient number, since it is larger than the sum of its proper divisors (1350503).

404220402217 is an equidigital number, since it uses as much as digits as its factorization.

404220402217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350502.

The product of its (nonzero) digits is 7168, while the sum is 28.

The spelling of 404220402217 in words is "four hundred four billion, two hundred twenty million, four hundred two thousand, two hundred seventeen".