424444220257 has 2 divisors, whose sum is σ = 424444220258. Its totient is φ = 424444220256.

The previous prime is 424444220201. The next prime is 424444220269. The reversal of 424444220257 is 752022444424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 355258913296 + 69185306961 = 596036^2 + 263031^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-424444220257 is a prime.

It is a super-2 number, since 2×424444220257² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (424444220657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212222110128 + 212222110129.

It is an arithmetic number, because the mean of its divisors is an integer number (212222110129).

Almost surely, 2^424444220257 is an apocalyptic number.

It is an amenable number.

424444220257 is a deficient number, since it is larger than the sum of its proper divisors (1).

424444220257 is an equidigital number, since it uses as much as digits as its factorization.

424444220257 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 424444220257 in words is "four hundred twenty-four billion, four hundred forty-four million, two hundred twenty thousand, two hundred fifty-seven".