320131 has 16 divisors (see below), whose sum is σ = 403200. Its totient is φ = 247968.

The previous prime is 320119. The next prime is 320141. The reversal of 320131 is 131023.

320131 = T₄₃ + T₄₄ + ... + T₁₂₅.

It is a de Polignac number, because none of the positive numbers 2^k-320131 is a prime.

It is a super-2 number, since 2×320131² = 204967714322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320101) 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, 3816 + ... + 3898.

It is an arithmetic number, because the mean of its divisors is an integer number (25200).

2³²⁰¹³¹ is an apocalyptic number.

320131 is a deficient number, since it is larger than the sum of its proper divisors (83069).

320131 is a wasteful number, since it uses less digits than its factorization.

320131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 320131 is about 565.8012018368. The cubic root of 320131 is about 68.4083702124.

Adding to 320131 its reverse (131023), we get a palindrome (451154).

The spelling of 320131 in words is "three hundred twenty thousand, one hundred thirty-one".