320013131243 has 32 divisors (see below), whose sum is σ = 361311088320. Its totient is φ = 281498480640.

The previous prime is 320013131209. The next prime is 320013131261. The reversal of 320013131243 is 342131310023.

It is a de Polignac number, because none of the positive numbers 2^k-320013131243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320013131203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4904771 + ... + 4969587.

It is an arithmetic number, because the mean of its divisors is an integer number (11290971510).

Almost surely, 2^320013131243 is an apocalyptic number.

320013131243 is a deficient number, since it is larger than the sum of its proper divisors (41297957077).

320013131243 is a wasteful number, since it uses less digits than its factorization.

320013131243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65087.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 320013131243 its reverse (342131310023), we get a palindrome (662144441266).

The spelling of 320013131243 in words is "three hundred twenty billion, thirteen million, one hundred thirty-one thousand, two hundred forty-three".