222143281 has 2 divisors, whose sum is σ = 222143282. Its totient is φ = 222143280.

The previous prime is 222143249. The next prime is 222143321. The reversal of 222143281 is 182341222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220968225 + 1175056 = 14865^2 + 1084^2 .

It is a cyclic number.

It is not a de Polignac number, because 222143281 - 2⁵ = 222143249 is a prime.

It is a super-2 number, since 2×222143281² = 98695274586889922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (222143221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111071640 + 111071641.

It is an arithmetic number, because the mean of its divisors is an integer number (111071641).

Almost surely, 2^222143281 is an apocalyptic number.

It is an amenable number.

222143281 is a deficient number, since it is larger than the sum of its proper divisors (1).

222143281 is an equidigital number, since it uses as much as digits as its factorization.

222143281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536, while the sum is 25.

The square root of 222143281 is about 14904.4718457247. The cubic root of 222143281 is about 605.6351329226.

The spelling of 222143281 in words is "two hundred twenty-two million, one hundred forty-three thousand, two hundred eighty-one".