320320001 has 4 divisors (see below), whose sum is σ = 339162372. Its totient is φ = 301477632.

The previous prime is 320319973. The next prime is 320320037. The reversal of 320320001 is 100023023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100023023 = 4217 ⋅23719.

It can be written as a sum of positive squares in 2 ways, for example, as 187032976 + 133287025 = 13676^2 + 11545^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320320001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (320320081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9421160 + ... + 9421193.

It is an arithmetic number, because the mean of its divisors is an integer number (84790593).

Almost surely, 2^320320001 is an apocalyptic number.

It is an amenable number.

320320001 is a deficient number, since it is larger than the sum of its proper divisors (18842371).

320320001 is a wasteful number, since it uses less digits than its factorization.

320320001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18842370.

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 320320001 is about 17897.4858848946. The cubic root of 320320001 is about 684.2183002188.

Adding to 320320001 its reverse (100023023), we get a palindrome (420343024).

The spelling of 320320001 in words is "three hundred twenty million, three hundred twenty thousand, one".