422864343821 has 2 divisors, whose sum is σ = 422864343822. Its totient is φ = 422864343820.

The previous prime is 422864343787. The next prime is 422864343893. The reversal of 422864343821 is 128343468224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 415109604100 + 7754739721 = 644290^2 + 88061^2 .

It is a cyclic number.

It is not a de Polignac number, because 422864343821 - 2⁶ = 422864343757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422864342821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211432171910 + 211432171911.

It is an arithmetic number, because the mean of its divisors is an integer number (211432171911).

Almost surely, 2^422864343821 is an apocalyptic number.

It is an amenable number.

422864343821 is a deficient number, since it is larger than the sum of its proper divisors (1).

422864343821 is an equidigital number, since it uses as much as digits as its factorization.

422864343821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1769472, while the sum is 47.

The spelling of 422864343821 in words is "four hundred twenty-two billion, eight hundred sixty-four million, three hundred forty-three thousand, eight hundred twenty-one".