131223031320 has 64 divisors (see below), whose sum is σ = 394031646720. Its totient is φ = 34960581504.

The previous prime is 131223031319. The next prime is 131223031333. The reversal of 131223031320 is 23130322131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 372562 + ... + 633441.

It is an arithmetic number, because the mean of its divisors is an integer number (6156744480).

Almost surely, 2^131223031320 is an apocalyptic number.

131223031320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131223031320 is an abundant number, since it is smaller than the sum of its proper divisors (262808615400).

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

131223031320 is a wasteful number, since it uses less digits than its factorization.

131223031320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007104 (or 1007100 counting only the distinct ones).

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

Adding to 131223031320 its reverse (23130322131), we get a palindrome (154353353451).

The spelling of 131223031320 in words is "one hundred thirty-one billion, two hundred twenty-three million, thirty-one thousand, three hundred twenty".