320131203231 has 16 divisors (see below), whose sum is σ = 489554995968. Its totient is φ = 182281108800.

The previous prime is 320131203221. The next prime is 320131203239. The reversal of 320131203231 is 132302131023.

It is not a de Polignac number, because 320131203231 - 2⁹ = 320131202719 is a prime.

It is a super-2 number, since 2×320131203231² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 320131203198 and 320131203207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320131203239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27119265 + ... + 27131066.

It is an arithmetic number, because the mean of its divisors is an integer number (30597187248).

Almost surely, 2^320131203231 is an apocalyptic number.

320131203231 is a deficient number, since it is larger than the sum of its proper divisors (169423792737).

320131203231 is a wasteful number, since it uses less digits than its factorization.

320131203231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54250622.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 320131203231 its reverse (132302131023), we get a palindrome (452433334254).

The spelling of 320131203231 in words is "three hundred twenty billion, one hundred thirty-one million, two hundred three thousand, two hundred thirty-one".