223685321 has 2 divisors, whose sum is σ = 223685322. Its totient is φ = 223685320.

The previous prime is 223685317. The next prime is 223685377. The reversal of 223685321 is 123586322.

223685321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209207296 + 14478025 = 14464^2 + 3805^2 .

It is a cyclic number.

It is not a de Polignac number, because 223685321 - 2² = 223685317 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (223685221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111842660 + 111842661.

It is an arithmetic number, because the mean of its divisors is an integer number (111842661).

Almost surely, 2^223685321 is an apocalyptic number.

It is an amenable number.

223685321 is a deficient number, since it is larger than the sum of its proper divisors (1).

223685321 is an equidigital number, since it uses as much as digits as its factorization.

223685321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 32.

The square root of 223685321 is about 14956.1131648567. The cubic root of 223685321 is about 607.0332709857.

The spelling of 223685321 in words is "two hundred twenty-three million, six hundred eighty-five thousand, three hundred twenty-one".