223705681 has 8 divisors (see below), whose sum is σ = 232182720. Its totient is φ = 215279568.

The previous prime is 223705679. The next prime is 223705709. The reversal of 223705681 is 186507322.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 223705681 - 2¹ = 223705679 is a prime.

It is a super-2 number, since 2×223705681² = 100088463423347522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223705621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3661 + ... + 21466.

It is an arithmetic number, because the mean of its divisors is an integer number (29022840).

Almost surely, 2^223705681 is an apocalyptic number.

It is an amenable number.

223705681 is a deficient number, since it is larger than the sum of its proper divisors (8477039).

223705681 is a wasteful number, since it uses less digits than its factorization.

223705681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25463.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 223705681 is about 14956.7938074976. The cubic root of 223705681 is about 607.0516879630.

The spelling of 223705681 in words is "two hundred twenty-three million, seven hundred five thousand, six hundred eighty-one".