320131311 has 8 divisors (see below), whose sum is σ = 428233344. Its totient is φ = 212725080.

The previous prime is 320131307. The next prime is 320131333. The reversal of 320131311 is 113131023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 320131311 - 2² = 320131307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320131391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172875 + ... + 174716.

It is an arithmetic number, because the mean of its divisors is an integer number (53529168).

Almost surely, 2^320131311 is an apocalyptic number.

320131311 is a deficient number, since it is larger than the sum of its proper divisors (108102033).

320131311 is a wasteful number, since it uses less digits than its factorization.

320131311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347901.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 320131311 is about 17892.2136975837. The cubic root of 320131311 is about 684.0839236480.

Adding to 320131311 its reverse (113131023), we get a palindrome (433262334).

The spelling of 320131311 in words is "three hundred twenty million, one hundred thirty-one thousand, three hundred eleven".