2203221281 has 2 divisors, whose sum is σ = 2203221282. Its totient is φ = 2203221280.

The previous prime is 2203221257. The next prime is 2203221331. The reversal of 2203221281 is 1821223022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1718517025 + 484704256 = 41455^2 + 22016^2 .

It is a cyclic number.

It is not a de Polignac number, because 2203221281 - 2⁶ = 2203221217 is a prime.

It is a super-4 number, since 4×2203221281⁴ (a number of 38 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3, 2.

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 (2203221211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1101610640 + 1101610641.

It is an arithmetic number, because the mean of its divisors is an integer number (1101610641).

Almost surely, 2^2203221281 is an apocalyptic number.

It is an amenable number.

2203221281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2203221281 is an equidigital number, since it uses as much as digits as its factorization.

2203221281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 2203221281 is about 46938.4840083273. The cubic root of 2203221281 is about 1301.2259206942.

The spelling of 2203221281 in words is "two billion, two hundred three million, two hundred twenty-one thousand, two hundred eighty-one".