423022665 has 32 divisors (see below), whose sum is σ = 748613376. Its totient is φ = 202625280.

The previous prime is 423022651. The next prime is 423022667. The reversal of 423022665 is 566220324.

423022665 = 1739² + 1740² + ... + 1868².

It is not a de Polignac number, because 423022665 - 2¹² = 423018569 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (423022667) 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 31 ways as a sum of consecutive naturals, for example, 22101 + ... + 36530.

It is an arithmetic number, because the mean of its divisors is an integer number (23394168).

Almost surely, 2^423022665 is an apocalyptic number.

It is an amenable number.

423022665 is a deficient number, since it is larger than the sum of its proper divisors (325590711).

423022665 is a wasteful number, since it uses less digits than its factorization.

423022665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58689.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 423022665 is about 20567.5147988278. The cubic root of 423022665 is about 750.6794819975.

Adding to 423022665 its reverse (566220324), we get a palindrome (989242989).

The spelling of 423022665 in words is "four hundred twenty-three million, twenty-two thousand, six hundred sixty-five".