223808665 has 12 divisors (see below), whose sum is σ = 273935844. Its totient is φ = 175477536.

The previous prime is 223808647. The next prime is 223808677. The reversal of 223808665 is 566808322.

223808665 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 2 ways, for example, as 121616784 + 102191881 = 11028^2 + 10109^2 .

It is not a de Polignac number, because 223808665 - 2⁵ = 223808633 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 243076 + ... + 243994.

It is an arithmetic number, because the mean of its divisors is an integer number (22827987).

Almost surely, 2^223808665 is an apocalyptic number.

It is an amenable number.

223808665 is a deficient number, since it is larger than the sum of its proper divisors (50127179).

223808665 is an frugal number, since it uses more digits than its factorization.

223808665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1896 (or 977 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 223808665 is about 14960.2361278156. The cubic root of 223808665 is about 607.1448267394.

The spelling of 223808665 in words is "two hundred twenty-three million, eight hundred eight thousand, six hundred sixty-five".