424222020251 has 2 divisors, whose sum is σ = 424222020252. Its totient is φ = 424222020250.

The previous prime is 424222020239. The next prime is 424222020293. The reversal of 424222020251 is 152020222424.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 424222020251 - 2¹⁰ = 424222019227 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 424222020251.

It is not a weakly prime, because it can be changed into another prime (424222020221) 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, 212111010125 + 212111010126.

It is an arithmetic number, because the mean of its divisors is an integer number (212111010126).

Almost surely, 2^424222020251 is an apocalyptic number.

424222020251 is a deficient number, since it is larger than the sum of its proper divisors (1).

424222020251 is an equidigital number, since it uses as much as digits as its factorization.

424222020251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5120, while the sum is 26.

Adding to 424222020251 its reverse (152020222424), we get a palindrome (576242242675).

The spelling of 424222020251 in words is "four hundred twenty-four billion, two hundred twenty-two million, twenty thousand, two hundred fifty-one".