215540410073 has 2 divisors, whose sum is σ = 215540410074. Its totient is φ = 215540410072.

The previous prime is 215540410039. The next prime is 215540410133. The reversal of 215540410073 is 370014045512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185892047104 + 29648362969 = 431152^2 + 172187^2 .

It is a cyclic number.

It is not a de Polignac number, because 215540410073 - 2¹⁴ = 215540393689 is a prime.

It is not a weakly prime, because it can be changed into another prime (215540410273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107770205036 + 107770205037.

It is an arithmetic number, because the mean of its divisors is an integer number (107770205037).

Almost surely, 2^215540410073 is an apocalyptic number.

It is an amenable number.

215540410073 is a deficient number, since it is larger than the sum of its proper divisors (1).

215540410073 is an equidigital number, since it uses as much as digits as its factorization.

215540410073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16800, while the sum is 32.

Adding to 215540410073 its reverse (370014045512), we get a palindrome (585554455585).

The spelling of 215540410073 in words is "two hundred fifteen billion, five hundred forty million, four hundred ten thousand, seventy-three".