404431223 has 4 divisors (see below), whose sum is σ = 462207120. Its totient is φ = 346655328.

The previous prime is 404431189. The next prime is 404431243. The reversal of 404431223 is 322134404.

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 404431223 - 2¹⁴ = 404414839 is a prime.

It is a super-2 number, since 2×404431223² = 327129228274551458, 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 (404431243) 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, 28887938 + ... + 28887951.

It is an arithmetic number, because the mean of its divisors is an integer number (115551780).

Almost surely, 2^404431223 is an apocalyptic number.

404431223 is a deficient number, since it is larger than the sum of its proper divisors (57775897).

404431223 is an equidigital number, since it uses as much as digits as its factorization.

404431223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57775896.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 404431223 is about 20110.4754543497. The cubic root of 404431223 is about 739.5171082561.

Adding to 404431223 its reverse (322134404), we get a palindrome (726565627).

The spelling of 404431223 in words is "four hundred four million, four hundred thirty-one thousand, two hundred twenty-three".