131023231320 has 128 divisors (see below), whose sum is σ = 400733749440. Its totient is φ = 34259097600.

The previous prime is 131023231309. The next prime is 131023231343. The reversal of 131023231320 is 23132320131.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12084942 + ... + 12095778.

Almost surely, 2^131023231320 is an apocalyptic number.

131023231320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131023231320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200366874720).

131023231320 is an abundant number, since it is smaller than the sum of its proper divisors (269710518120).

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

131023231320 is a wasteful number, since it uses less digits than its factorization.

131023231320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12805 (or 12801 counting only the distinct ones).

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

Adding to 131023231320 its reverse (23132320131), we get a palindrome (154155551451).

The spelling of 131023231320 in words is "one hundred thirty-one billion, twenty-three million, two hundred thirty-one thousand, three hundred twenty".