320131311243 has 16 divisors (see below), whose sum is σ = 431728305696. Its totient is φ = 210984070400.

The previous prime is 320131311229. The next prime is 320131311281. The reversal of 320131311243 is 342113131023.

It is a cyclic number.

It is not a de Polignac number, because 320131311243 - 2⁶ = 320131311179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320131311443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 611130 + ... + 1006847.

It is an arithmetic number, because the mean of its divisors is an integer number (26983019106).

Almost surely, 2^320131311243 is an apocalyptic number.

320131311243 is a deficient number, since it is larger than the sum of its proper divisors (111596994453).

320131311243 is a wasteful number, since it uses less digits than its factorization.

320131311243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618734.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 320131311243 its reverse (342113131023), we get a palindrome (662244442266).

The spelling of 320131311243 in words is "three hundred twenty billion, one hundred thirty-one million, three hundred eleven thousand, two hundred forty-three".