2221022257 has 2 divisors, whose sum is σ = 2221022258. Its totient is φ = 2221022256.

The previous prime is 2221022231. The next prime is 2221022281. The reversal of 2221022257 is 7522201222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2220388641 + 633616 = 47121^2 + 796^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221022257 - 2²⁷ = 2086804529 is a prime.

It is not a weakly prime, because it can be changed into another prime (2221022227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110511128 + 1110511129.

It is an arithmetic number, because the mean of its divisors is an integer number (1110511129).

Almost surely, 2^2221022257 is an apocalyptic number.

It is an amenable number.

2221022257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221022257 is an equidigital number, since it uses as much as digits as its factorization.

2221022257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 2221022257 is about 47127.7228072819. The cubic root of 2221022257 is about 1304.7209528479.

Adding to 2221022257 its reverse (7522201222), we get a palindrome (9743223479).

The spelling of 2221022257 in words is "two billion, two hundred twenty-one million, twenty-two thousand, two hundred fifty-seven".