223985906 has 4 divisors (see below), whose sum is σ = 335978862. Its totient is φ = 111992952.

The previous prime is 223985903. The next prime is 223985917. The reversal of 223985906 is 609589322.

223985906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 193460281 + 30525625 = 13909^2 + 5525^2 .

It is not an unprimeable number, because it can be changed into a prime (223985903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55996475 + ... + 55996478.

Almost surely, 2^223985906 is an apocalyptic number.

223985906 is a deficient number, since it is larger than the sum of its proper divisors (111992956).

223985906 is a wasteful number, since it uses less digits than its factorization.

223985906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111992955.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 223985906 is about 14966.1586921962. The cubic root of 223985906 is about 607.3050567017.

The spelling of 223985906 in words is "two hundred twenty-three million, nine hundred eighty-five thousand, nine hundred six".