222444242257 has 2 divisors, whose sum is σ = 222444242258. Its totient is φ = 222444242256.

The previous prime is 222444242203. The next prime is 222444242263. The reversal of 222444242257 is 752242444222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134842449681 + 87601792576 = 367209^2 + 295976^2 .

It is a cyclic number.

It is not a de Polignac number, because 222444242257 - 2¹⁵ = 222444209489 is a prime.

It is not a weakly prime, because it can be changed into another prime (222444242057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111222121128 + 111222121129.

It is an arithmetic number, because the mean of its divisors is an integer number (111222121129).

Almost surely, 2^222444242257 is an apocalyptic number.

It is an amenable number.

222444242257 is a deficient number, since it is larger than the sum of its proper divisors (1).

222444242257 is an equidigital number, since it uses as much as digits as its factorization.

222444242257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 573440, while the sum is 40.

Adding to 222444242257 its reverse (752242444222), we get a palindrome (974686686479).

The spelling of 222444242257 in words is "two hundred twenty-two billion, four hundred forty-four million, two hundred forty-two thousand, two hundred fifty-seven".