320135315209 has 2 divisors, whose sum is σ = 320135315210. Its totient is φ = 320135315208.

The previous prime is 320135315207. The next prime is 320135315239. The reversal of 320135315209 is 902513531023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240457833225 + 79677481984 = 490365^2 + 282272^2 .

It is a cyclic number.

It is not a de Polignac number, because 320135315209 - 2¹ = 320135315207 is a prime.

Together with 320135315207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (320135315207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160067657604 + 160067657605.

It is an arithmetic number, because the mean of its divisors is an integer number (160067657605).

Almost surely, 2^320135315209 is an apocalyptic number.

It is an amenable number.

320135315209 is a deficient number, since it is larger than the sum of its proper divisors (1).

320135315209 is an equidigital number, since it uses as much as digits as its factorization.

320135315209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24300, while the sum is 34.

The spelling of 320135315209 in words is "three hundred twenty billion, one hundred thirty-five million, three hundred fifteen thousand, two hundred nine".