131231302131320 has 64 divisors (see below), whose sum is σ = 302140611717120. Its totient is φ = 51271182877824.

The previous prime is 131231302131289. The next prime is 131231302131341. The reversal of 131231302131320 is 23131203132131.

It is a self number, because there is not a number n which added to its sum of digits gives 131231302131320.

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, 170941049 + ... + 171707031.

It is an arithmetic number, because the mean of its divisors is an integer number (4720947058080).

Almost surely, 2^{131231302131320} is an apocalyptic number.

131231302131320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131231302131320 is an abundant number, since it is smaller than the sum of its proper divisors (170909309585800).

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

131231302131320 is a wasteful number, since it uses less digits than its factorization.

131231302131320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865644 (or 865640 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 131231302131320 its reverse (23131203132131), we get a palindrome (154362505263451).

The spelling of 131231302131320 in words is "one hundred thirty-one trillion, two hundred thirty-one billion, three hundred two million, one hundred thirty-one thousand, three hundred twenty".