404311231 has 8 divisors (see below), whose sum is σ = 410015744. Its totient is φ = 398646360.

The previous prime is 404311217. The next prime is 404311307. The reversal of 404311231 is 132113404.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 404311231 - 2⁵ = 404311199 is a prime.

It is a super-2 number, since 2×404311231² = 326935143025470722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 404311199 and 404311208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404311211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10936 + ... + 30466.

It is an arithmetic number, because the mean of its divisors is an integer number (51251968).

Almost surely, 2^404311231 is an apocalyptic number.

404311231 is a deficient number, since it is larger than the sum of its proper divisors (5704513).

404311231 is a wasteful number, since it uses less digits than its factorization.

404311231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19821.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 404311231 is about 20107.4919122202. The cubic root of 404311231 is about 739.4439644523.

Adding to 404311231 its reverse (132113404), we get a palindrome (536424635).

The spelling of 404311231 in words is "four hundred four million, three hundred eleven thousand, two hundred thirty-one".