320131444433 has 4 divisors (see below), whose sum is σ = 320664109668. Its totient is φ = 319598779200.

The previous prime is 320131444427. The next prime is 320131444447. The reversal of 320131444433 is 334444131023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 334444131023 = 22501 ⋅14863523.

It can be written as a sum of positive squares in 2 ways, for example, as 252589671889 + 67541772544 = 502583^2 + 259888^2 .

It is a cyclic number.

It is not a de Polignac number, because 320131444433 - 2⁴ = 320131444417 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 320131444433.

It is not an unprimeable number, because it can be changed into a prime (320131444033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266331716 + ... + 266332917.

It is an arithmetic number, because the mean of its divisors is an integer number (80166027417).

Almost surely, 2^320131444433 is an apocalyptic number.

It is an amenable number.

320131444433 is a deficient number, since it is larger than the sum of its proper divisors (532665235).

320131444433 is an equidigital number, since it uses as much as digits as its factorization.

320131444433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532665234.

The product of its (nonzero) digits is 41472, while the sum is 32.

Adding to 320131444433 its reverse (334444131023), we get a palindrome (654575575456).

The spelling of 320131444433 in words is "three hundred twenty billion, one hundred thirty-one million, four hundred forty-four thousand, four hundred thirty-three".