404340031331 has 4 divisors (see below), whose sum is σ = 406153215552. Its totient is φ = 402526847112.

The previous prime is 404340031259. The next prime is 404340031379. The reversal of 404340031331 is 133130043404.

It is a happy number.

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 404340031331 - 2¹⁸ = 404339769187 is a prime.

It is a super-2 number, since 2×404340031331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 404340031331.

It is not an unprimeable number, because it can be changed into a prime (404340031391) 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, 906591776 + ... + 906592221.

It is an arithmetic number, because the mean of its divisors is an integer number (101538303888).

Almost surely, 2^404340031331 is an apocalyptic number.

404340031331 is a deficient number, since it is larger than the sum of its proper divisors (1813184221).

404340031331 is a wasteful number, since it uses less digits than its factorization.

404340031331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1813184220.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 404340031331 its reverse (133130043404), we get a palindrome (537470074735).

The spelling of 404340031331 in words is "four hundred four billion, three hundred forty million, thirty-one thousand, three hundred thirty-one".