404223131231 has 4 divisors (see below), whose sum is σ = 404240757432. Its totient is φ = 404205505032.

The previous prime is 404223131219. The next prime is 404223131243. The reversal of 404223131231 is 132131322404.

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

It is an interprime number because it is at equal distance from previous prime (404223131219) and next prime (404223131243).

It is a cyclic number.

It is not a de Polignac number, because 404223131231 - 2¹⁴ = 404223114847 is a prime.

It is a super-2 number, since 2×404223131231² (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 404223131231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404223131261) 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, 8778656 + ... + 8824581.

It is an arithmetic number, because the mean of its divisors is an integer number (101060189358).

Almost surely, 2^404223131231 is an apocalyptic number.

404223131231 is a deficient number, since it is larger than the sum of its proper divisors (17626201).

404223131231 is a wasteful number, since it uses less digits than its factorization.

404223131231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17626200.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 404223131231 its reverse (132131322404), we get a palindrome (536354453635).

The spelling of 404223131231 in words is "four hundred four billion, two hundred twenty-three million, one hundred thirty-one thousand, two hundred thirty-one".