2222021257 has 2 divisors, whose sum is σ = 2222021258. Its totient is φ = 2222021256.

The previous prime is 2222021251. The next prime is 2222021297. The reversal of 2222021257 is 7521202222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2195765881 + 26255376 = 46859^2 + 5124^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2222021257 is a prime.

It is not a weakly prime, because it can be changed into another prime (2222021251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1111010628 + 1111010629.

It is an arithmetic number, because the mean of its divisors is an integer number (1111010629).

Almost surely, 2^2222021257 is an apocalyptic number.

It is an amenable number.

2222021257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2222021257 is an equidigital number, since it uses as much as digits as its factorization.

2222021257 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 2222021257 is about 47138.3204728382. The cubic root of 2222021257 is about 1304.9165415915.

Adding to 2222021257 its reverse (7521202222), we get a palindrome (9743223479).

The spelling of 2222021257 in words is "two billion, two hundred twenty-two million, twenty-one thousand, two hundred fifty-seven".