215342040400073 has 2 divisors, whose sum is σ = 215342040400074. Its totient is φ = 215342040400072.

The previous prime is 215342040399883. The next prime is 215342040400079. The reversal of 215342040400073 is 370004040243512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 168467861553289 + 46874178846784 = 12979517^2 + 6846472^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215342040400073 is a prime.

It is not a weakly prime, because it can be changed into another prime (215342040400079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107671020200036 + 107671020200037.

It is an arithmetic number, because the mean of its divisors is an integer number (107671020200037).

Almost surely, 2^{215342040400073} is an apocalyptic number.

It is an amenable number.

215342040400073 is a deficient number, since it is larger than the sum of its proper divisors (1).

215342040400073 is an equidigital number, since it uses as much as digits as its factorization.

215342040400073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 35.

Adding to 215342040400073 its reverse (370004040243512), we get a palindrome (585346080643585).

The spelling of 215342040400073 in words is "two hundred fifteen trillion, three hundred forty-two billion, forty million, four hundred thousand, seventy-three".