22420422217 has 2 divisors, whose sum is σ = 22420422218. Its totient is φ = 22420422216.

The previous prime is 22420422197. The next prime is 22420422251. The reversal of 22420422217 is 71222402422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16446523536 + 5973898681 = 128244^2 + 77291^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22420422217 is a prime.

It is not a weakly prime, because it can be changed into another prime (22420425217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11210211108 + 11210211109.

It is an arithmetic number, because the mean of its divisors is an integer number (11210211109).

Almost surely, 2^22420422217 is an apocalyptic number.

It is an amenable number.

22420422217 is a deficient number, since it is larger than the sum of its proper divisors (1).

22420422217 is an equidigital number, since it uses as much as digits as its factorization.

22420422217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7168, while the sum is 28.

Adding to 22420422217 its reverse (71222402422), we get a palindrome (93642824639).

The spelling of 22420422217 in words is "twenty-two billion, four hundred twenty million, four hundred twenty-two thousand, two hundred seventeen".