22231204442257 has 2 divisors, whose sum is σ = 22231204442258. Its totient is φ = 22231204442256.

The previous prime is 22231204442197. The next prime is 22231204442327. The reversal of 22231204442257 is 75224440213222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15502181672961 + 6729022769296 = 3937281^2 + 2594036^2 .

It is a cyclic number.

It is not a de Polignac number, because 22231204442257 - 2¹⁹ = 22231203917969 is a prime.

It is not a weakly prime, because it can be changed into another prime (22231204422257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11115602221128 + 11115602221129.

It is an arithmetic number, because the mean of its divisors is an integer number (11115602221129).

Almost surely, 2^{22231204442257} is an apocalyptic number.

It is an amenable number.

22231204442257 is a deficient number, since it is larger than the sum of its proper divisors (1).

22231204442257 is an equidigital number, since it uses as much as digits as its factorization.

22231204442257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 430080, while the sum is 40.

Adding to 22231204442257 its reverse (75224440213222), we get a palindrome (97455644655479).

The spelling of 22231204442257 in words is "twenty-two trillion, two hundred thirty-one billion, two hundred four million, four hundred forty-two thousand, two hundred fifty-seven".