222816281 has 2 divisors, whose sum is σ = 222816282. Its totient is φ = 222816280.

The previous prime is 222816241. The next prime is 222816283. The reversal of 222816281 is 182618222.

222816281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199967881 + 22848400 = 14141^2 + 4780^2 .

It is a cyclic number.

It is not a de Polignac number, because 222816281 - 2¹⁴ = 222799897 is a prime.

It is a super-2 number, since 2×222816281² = 99294190157341922, which contains 22 as substring.

Together with 222816283, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (222816283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111408140 + 111408141.

It is an arithmetic number, because the mean of its divisors is an integer number (111408141).

Almost surely, 2^222816281 is an apocalyptic number.

It is an amenable number.

222816281 is a deficient number, since it is larger than the sum of its proper divisors (1).

222816281 is an equidigital number, since it uses as much as digits as its factorization.

222816281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6144, while the sum is 32.

The square root of 222816281 is about 14927.0318884901. The cubic root of 222816281 is about 606.2461222553.

The spelling of 222816281 in words is "two hundred twenty-two million, eight hundred sixteen thousand, two hundred eighty-one".