320220371 has 2 divisors, whose sum is σ = 320220372. Its totient is φ = 320220370.

The previous prime is 320220343. The next prime is 320220379. The reversal of 320220371 is 173022023.

It is a strong prime.

It is an emirp because it is prime and its reverse (173022023) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320220371 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (320220379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160110185 + 160110186.

It is an arithmetic number, because the mean of its divisors is an integer number (160110186).

Almost surely, 2^320220371 is an apocalyptic number.

320220371 is a deficient number, since it is larger than the sum of its proper divisors (1).

320220371 is an equidigital number, since it uses as much as digits as its factorization.

320220371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 320220371 is about 17894.7023166076. The cubic root of 320220371 is about 684.1473547707.

Adding to 320220371 its reverse (173022023), we get a palindrome (493242394).

The spelling of 320220371 in words is "three hundred twenty million, two hundred twenty thousand, three hundred seventy-one".