404321231 has 4 divisors (see below), whose sum is σ = 409859952. Its totient is φ = 398782512.

The previous prime is 404321207. The next prime is 404321233. The reversal of 404321231 is 132123404.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 404321231 - 2¹⁰ = 404320207 is a prime.

It is a super-2 number, since 2×404321231² = 326951315674710722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404321233) 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, 2769251 + ... + 2769396.

It is an arithmetic number, because the mean of its divisors is an integer number (102464988).

Almost surely, 2^404321231 is an apocalyptic number.

404321231 is a deficient number, since it is larger than the sum of its proper divisors (5538721).

404321231 is an equidigital number, since it uses as much as digits as its factorization.

404321231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5538720.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 404321231 is about 20107.7405742167. The cubic root of 404321231 is about 739.4500607284.

Adding to 404321231 its reverse (132123404), we get a palindrome (536444635).

The spelling of 404321231 in words is "four hundred four million, three hundred twenty-one thousand, two hundred thirty-one".