423223665 has 16 divisors (see below), whose sum is σ = 682330176. Its totient is φ = 223995200.

The previous prime is 423223643. The next prime is 423223679. The reversal of 423223665 is 566322324.

It is not a de Polignac number, because 423223665 - 2¹⁵ = 423190897 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105726 + ... + 109655.

It is an arithmetic number, because the mean of its divisors is an integer number (42645636).

Almost surely, 2^423223665 is an apocalyptic number.

It is an amenable number.

423223665 is a deficient number, since it is larger than the sum of its proper divisors (259106511).

423223665 is a wasteful number, since it uses less digits than its factorization.

423223665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215520.

The product of its digits is 51840, while the sum is 33.

The square root of 423223665 is about 20572.4005648344. The cubic root of 423223665 is about 750.7983587517.

Adding to 423223665 its reverse (566322324), we get a palindrome (989545989).

The spelling of 423223665 in words is "four hundred twenty-three million, two hundred twenty-three thousand, six hundred sixty-five".