305216473 has 2 divisors, whose sum is σ = 305216474. Its totient is φ = 305216472.

The previous prime is 305216413. The next prime is 305216477. The reversal of 305216473 is 374612503.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170354704 + 134861769 = 13052^2 + 11613^2 .

It is an emirp because it is prime and its reverse (374612503) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 305216473 - 2⁹ = 305215961 is a prime.

It is not a weakly prime, because it can be changed into another prime (305216477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152608236 + 152608237.

It is an arithmetic number, because the mean of its divisors is an integer number (152608237).

Almost surely, 2^305216473 is an apocalyptic number.

It is an amenable number.

305216473 is a deficient number, since it is larger than the sum of its proper divisors (1).

305216473 is an equidigital number, since it uses as much as digits as its factorization.

305216473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 305216473 is about 17470.4457012407. The cubic root of 305216473 is about 673.2907632194.

Adding to 305216473 its reverse (374612503), we get a palindrome (679828976).

The spelling of 305216473 in words is "three hundred five million, two hundred sixteen thousand, four hundred seventy-three".