320131243 has 4 divisors (see below), whose sum is σ = 320175688. Its totient is φ = 320086800.

The previous prime is 320131219. The next prime is 320131277. The reversal of 320131243 is 342131023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342131023 = 13 ⋅26317771.

It is a cyclic number.

It is not a de Polignac number, because 320131243 - 2⁵ = 320131211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320131243.

It is not an unprimeable number, because it can be changed into a prime (320111243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8658 + ... + 26743.

It is an arithmetic number, because the mean of its divisors is an integer number (80043922).

Almost surely, 2^320131243 is an apocalyptic number.

320131243 is a deficient number, since it is larger than the sum of its proper divisors (44445).

320131243 is an equidigital number, since it uses as much as digits as its factorization.

320131243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44444.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 320131243 is about 17892.2117973156. The cubic root of 320131243 is about 684.0838752119.

Adding to 320131243 its reverse (342131023), we get a palindrome (662262266).

The spelling of 320131243 in words is "three hundred twenty million, one hundred thirty-one thousand, two hundred forty-three".