223405506 has 32 divisors (see below), whose sum is σ = 504878400. Its totient is φ = 73205280.

The previous prime is 223405493. The next prime is 223405541. The reversal of 223405506 is 605504322.

It is a super-2 number, since 2×223405506² = 99820040222232072, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 223405506.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 31875 + ... + 38246.

It is an arithmetic number, because the mean of its divisors is an integer number (15777450).

Almost surely, 2^223405506 is an apocalyptic number.

223405506 is an abundant number, since it is smaller than the sum of its proper divisors (281472894).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

223405506 is a wasteful number, since it uses less digits than its factorization.

223405506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70191 (or 70185 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 223405506 is about 14946.7557014892. The cubic root of 223405506 is about 606.7800463668.

Adding to 223405506 its reverse (605504322), we get a palindrome (828909828).

The spelling of 223405506 in words is "two hundred twenty-three million, four hundred five thousand, five hundred six".