215822965711117 has 2 divisors, whose sum is σ = 215822965711118. Its totient is φ = 215822965711116.

The previous prime is 215822965711057. The next prime is 215822965711121. The reversal of 215822965711117 is 711117569228512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182305651247721 + 33517314463396 = 13502061^2 + 5789414^2 .

It is a cyclic number.

It is not a de Polignac number, because 215822965711117 - 2²⁷ = 215822831493389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215822965711187) 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, 107911482855558 + 107911482855559.

It is an arithmetic number, because the mean of its divisors is an integer number (107911482855559).

Almost surely, 2^{215822965711117} is an apocalyptic number.

It is an amenable number.

215822965711117 is a deficient number, since it is larger than the sum of its proper divisors (1).

215822965711117 is an equidigital number, since it uses as much as digits as its factorization.

215822965711117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4233600, while the sum is 58.

The spelling of 215822965711117 in words is "two hundred fifteen trillion, eight hundred twenty-two billion, nine hundred sixty-five million, seven hundred eleven thousand, one hundred seventeen".