320211137 has 2 divisors, whose sum is σ = 320211138. Its totient is φ = 320211136.

The previous prime is 320211119. The next prime is 320211139. The reversal of 320211137 is 731112023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 287675521 + 32535616 = 16961^2 + 5704^2 .

It is a cyclic number.

It is not a de Polignac number, because 320211137 - 2⁸ = 320210881 is a prime.

Together with 320211139, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (320211139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160105568 + 160105569.

It is an arithmetic number, because the mean of its divisors is an integer number (160105569).

Almost surely, 2^320211137 is an apocalyptic number.

It is an amenable number.

320211137 is a deficient number, since it is larger than the sum of its proper divisors (1).

320211137 is an equidigital number, since it uses as much as digits as its factorization.

320211137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 320211137 is about 17894.4443054262. Note that the first 3 decimals coincide. The cubic root of 320211137 is about 684.1407785939.

The spelling of 320211137 in words is "three hundred twenty million, two hundred eleven thousand, one hundred thirty-seven".