320003131 has 4 divisors (see below), whose sum is σ = 365717872. Its totient is φ = 274288392.

The previous prime is 320003069. The next prime is 320003137. The reversal of 320003131 is 131300023.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 320003131 - 2¹¹ = 320001083 is a prime.

It is a super-2 number, since 2×320003131² = 204804007699606322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320003137) 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, 22857360 + ... + 22857373.

It is an arithmetic number, because the mean of its divisors is an integer number (91429468).

Almost surely, 2^320003131 is an apocalyptic number.

320003131 is a deficient number, since it is larger than the sum of its proper divisors (45714741).

320003131 is an equidigital number, since it uses as much as digits as its factorization.

320003131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45714740.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 320003131 is about 17888.6313338947. The cubic root of 320003131 is about 683.9926094695.

Adding to 320003131 its reverse (131300023), we get a palindrome (451303154).

The spelling of 320003131 in words is "three hundred twenty million, three thousand, one hundred thirty-one".