131031310320 has 60 divisors (see below), whose sum is σ = 440046819576. Its totient is φ = 34941682560.

The previous prime is 131031310309. The next prime is 131031310321. The reversal of 131031310320 is 23013130131.

It is a happy number.

131031310320 is a `hidden beast` number, since 1 + 3 + 1 + 0 + 31 + 310 + 320 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×131031310320² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 131031310293 and 131031310302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131031310321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90993246 + ... + 90994685.

Almost surely, 2^131031310320 is an apocalyptic number.

131031310320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131031310320 is an abundant number, since it is smaller than the sum of its proper divisors (309015509256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131031310320 is a wasteful number, since it uses less digits than its factorization.

131031310320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181987950 (or 181987941 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 131031310320 its reverse (23013130131), we get a palindrome (154044440451).

The spelling of 131031310320 in words is "one hundred thirty-one billion, thirty-one million, three hundred ten thousand, three hundred twenty".