223663685 has 24 divisors (see below), whose sum is σ = 312884856. Its totient is φ = 153041280.

The previous prime is 223663681. The next prime is 223663709. The reversal of 223663685 is 586366322.

223663685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 19945156 + 203718529 = 4466^2 + 14273^2 .

It is not a de Polignac number, because 223663685 - 2² = 223663681 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223663681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 188795 + ... + 189975.

It is an arithmetic number, because the mean of its divisors is an integer number (13036869).

Almost surely, 2^223663685 is an apocalyptic number.

It is an amenable number.

223663685 is a deficient number, since it is larger than the sum of its proper divisors (89221171).

223663685 is a wasteful number, since it uses less digits than its factorization.

223663685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1973 (or 1966 counting only the distinct ones).

The product of its digits is 311040, while the sum is 41.

The square root of 223663685 is about 14955.3898310943. The cubic root of 223663685 is about 607.0136985565.

The spelling of 223663685 in words is "two hundred twenty-three million, six hundred sixty-three thousand, six hundred eighty-five".