215503324109 has 2 divisors, whose sum is σ = 215503324110. Its totient is φ = 215503324108.

The previous prime is 215503324081. The next prime is 215503324121. The reversal of 215503324109 is 901423305512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179778544009 + 35724780100 = 424003^2 + 189010^2 .

It is a cyclic number.

It is not a de Polignac number, because 215503324109 - 2²⁸ = 215234888653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215503324139) 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, 107751662054 + 107751662055.

It is an arithmetic number, because the mean of its divisors is an integer number (107751662055).

Almost surely, 2^215503324109 is an apocalyptic number.

It is an amenable number.

215503324109 is a deficient number, since it is larger than the sum of its proper divisors (1).

215503324109 is an equidigital number, since it uses as much as digits as its factorization.

215503324109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 215503324109 in words is "two hundred fifteen billion, five hundred three million, three hundred twenty-four thousand, one hundred nine".