320043131 has 8 divisors (see below), whose sum is σ = 321498000. Its totient is φ = 318592512.

The previous prime is 320043107. The next prime is 320043161. The reversal of 320043131 is 131340023.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 320043131 - 2¹⁸ = 319780987 is a prime.

It is a super-2 number, since 2×320043131² = 204855211400566322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320043161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335351 + ... + 336303.

It is an arithmetic number, because the mean of its divisors is an integer number (40187250).

Almost surely, 2^320043131 is an apocalyptic number.

320043131 is a deficient number, since it is larger than the sum of its proper divisors (1454869).

320043131 is an equidigital number, since it uses as much as digits as its factorization.

320043131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2125.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 320043131 is about 17889.7493274780. The cubic root of 320043131 is about 684.0211076954.

Adding to 320043131 its reverse (131340023), we get a palindrome (451383154).

The spelling of 320043131 in words is "three hundred twenty million, forty-three thousand, one hundred thirty-one".