220310309 has 2 divisors, whose sum is σ = 220310310. Its totient is φ = 220310308.

The previous prime is 220310297. The next prime is 220310317. The reversal of 220310309 is 903013022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139759684 + 80550625 = 11822^2 + 8975^2 .

It is a cyclic number.

It is not a de Polignac number, because 220310309 - 2⁸ = 220310053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220310609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110155154 + 110155155.

It is an arithmetic number, because the mean of its divisors is an integer number (110155155).

Almost surely, 2^220310309 is an apocalyptic number.

It is an amenable number.

220310309 is a deficient number, since it is larger than the sum of its proper divisors (1).

220310309 is an equidigital number, since it uses as much as digits as its factorization.

220310309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 220310309 is about 14842.8538024195. The cubic root of 220310309 is about 603.9647701408.

The spelling of 220310309 in words is "two hundred twenty million, three hundred ten thousand, three hundred nine".