223279681 has 2 divisors, whose sum is σ = 223279682. Its totient is φ = 223279680.

The previous prime is 223279669. The next prime is 223279747. The reversal of 223279681 is 186972322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161798400 + 61481281 = 12720^2 + 7841^2 .

It is a cyclic number.

It is not a de Polignac number, because 223279681 - 2²⁷ = 89061953 is a prime.

It is a super-3 number, since 3×223279681³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (223279601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111639840 + 111639841.

It is an arithmetic number, because the mean of its divisors is an integer number (111639841).

Almost surely, 2^223279681 is an apocalyptic number.

It is an amenable number.

223279681 is a deficient number, since it is larger than the sum of its proper divisors (1).

223279681 is an equidigital number, since it uses as much as digits as its factorization.

223279681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 40.

The square root of 223279681 is about 14942.5460012677. The cubic root of 223279681 is about 606.6661093999. Note that the first 3 decimals are identical.

The spelling of 223279681 in words is "two hundred twenty-three million, two hundred seventy-nine thousand, six hundred eighty-one".