22215354405217 has 2 divisors, whose sum is σ = 22215354405218. Its totient is φ = 22215354405216.

The previous prime is 22215354405121. The next prime is 22215354405221. The reversal of 22215354405217 is 71250445351222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20115727323136 + 2099627082081 = 4485056^2 + 1449009^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22215354405217 is a prime.

It is not a weakly prime, because it can be changed into another prime (22215354405917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11107677202608 + 11107677202609.

It is an arithmetic number, because the mean of its divisors is an integer number (11107677202609).

Almost surely, 2^{22215354405217} is an apocalyptic number.

It is an amenable number.

22215354405217 is a deficient number, since it is larger than the sum of its proper divisors (1).

22215354405217 is an equidigital number, since it uses as much as digits as its factorization.

22215354405217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672000, while the sum is 43.

Adding to 22215354405217 its reverse (71250445351222), we get a palindrome (93465799756439).

The spelling of 22215354405217 in words is "twenty-two trillion, two hundred fifteen billion, three hundred fifty-four million, four hundred five thousand, two hundred seventeen".