215078730049 has 2 divisors, whose sum is σ = 215078730050. Its totient is φ = 215078730048.

The previous prime is 215078730043. The next prime is 215078730149. The reversal of 215078730049 is 940037870512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215057570049 + 21160000 = 463743^2 + 4600^2 .

It is a cyclic number.

It is not a de Polignac number, because 215078730049 - 2¹⁹ = 215078205761 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 215078729990 and 215078730008.

It is not a weakly prime, because it can be changed into another prime (215078730043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107539365024 + 107539365025.

It is an arithmetic number, because the mean of its divisors is an integer number (107539365025).

Almost surely, 2^215078730049 is an apocalyptic number.

It is an amenable number.

215078730049 is a deficient number, since it is larger than the sum of its proper divisors (1).

215078730049 is an equidigital number, since it uses as much as digits as its factorization.

215078730049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 46.

The spelling of 215078730049 in words is "two hundred fifteen billion, seventy-eight million, seven hundred thirty thousand, forty-nine".