131031312 has 20 divisors (see below), whose sum is σ = 338497680. Its totient is φ = 43677088.

The previous prime is 131031301. The next prime is 131031337. The reversal of 131031312 is 213130131.

It is a junction number, because it is equal to n+sod(n) for n = 131031291 and 131031300.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1364862 + ... + 1364957.

It is an arithmetic number, because the mean of its divisors is an integer number (16924884).

Almost surely, 2^131031312 is an apocalyptic number.

131031312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

131031312 is an abundant number, since it is smaller than the sum of its proper divisors (207466368).

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

131031312 is a wasteful number, since it uses less digits than its factorization.

131031312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2729830 (or 2729824 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 131031312 is about 11446.8909316023. The cubic root of 131031312 is about 507.9157691995.

Adding to 131031312 its reverse (213130131), we get a palindrome (344161443).

The spelling of 131031312 in words is "one hundred thirty-one million, thirty-one thousand, three hundred twelve".