320131311242 has 16 divisors (see below), whose sum is σ = 492369381000. Its totient is φ = 156015490560.

The previous prime is 320131311229. The next prime is 320131311281. The reversal of 320131311242 is 242113131023.

It can be written as a sum of positive squares in 4 ways, for example, as 252203835601 + 67927475641 = 502199^2 + 260629^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1738367 + ... + 1913682.

Almost surely, 2^320131311242 is an apocalyptic number.

320131311242 is a deficient number, since it is larger than the sum of its proper divisors (172238069758).

320131311242 is a wasteful number, since it uses less digits than its factorization.

320131311242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3653161.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 320131311242 its reverse (242113131023), we get a palindrome (562244442265).

The spelling of 320131311242 in words is "three hundred twenty billion, one hundred thirty-one million, three hundred eleven thousand, two hundred forty-two".