423055665 has 48 divisors (see below), whose sum is σ = 755539200. Its totient is φ = 218889216.

The previous prime is 423055663. The next prime is 423055687. The reversal of 423055665 is 566550324.

It is a happy number.

423055665 is a `hidden beast` number, since 42 + 3 + 0 + 556 + 65 = 666.

It is not a de Polignac number, because 423055665 - 2¹ = 423055663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (423055663) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 208737 + ... + 210753.

It is an arithmetic number, because the mean of its divisors is an integer number (15740400).

Almost surely, 2^423055665 is an apocalyptic number.

423055665 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

423055665 is a deficient number, since it is larger than the sum of its proper divisors (332483535).

423055665 is a wasteful number, since it uses less digits than its factorization.

423055665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2166 (or 2163 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

The square root of 423055665 is about 20568.3170191438. The cubic root of 423055665 is about 750.6990016598.

It can be divided in two parts, 4230 and 55665, that added together give a palindrome (59895).

The spelling of 423055665 in words is "four hundred twenty-three million, fifty-five thousand, six hundred sixty-five".