404313231 has 16 divisors (see below), whose sum is σ = 623897600. Its totient is φ = 228110688.

The previous prime is 404313229. The next prime is 404313281. The reversal of 404313231 is 132313404.

It is not a de Polignac number, because 404313231 - 2¹ = 404313229 is a prime.

It is a super-2 number, since 2×404313231² = 326938377523318722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 404313198 and 404313207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404313281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120196 + ... + 123513.

It is an arithmetic number, because the mean of its divisors is an integer number (38993600).

Almost surely, 2^404313231 is an apocalyptic number.

404313231 is a deficient number, since it is larger than the sum of its proper divisors (219584369).

404313231 is a wasteful number, since it uses less digits than its factorization.

404313231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243798.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 404313231 is about 20107.5416448655. The cubic root of 404313231 is about 739.4451837156.

Adding to 404313231 its reverse (132313404), we get a palindrome (536626635).

The spelling of 404313231 in words is "four hundred four million, three hundred thirteen thousand, two hundred thirty-one".