131312256 has 32 divisors (see below), whose sum is σ = 348799200. Its totient is φ = 43770624.

The previous prime is 131312243. The next prime is 131312257. The reversal of 131312256 is 652213131.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (131312257) by changing a digit.

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, 170596 + ... + 171363.

It is an arithmetic number, because the mean of its divisors is an integer number (10899975).

Almost surely, 2^131312256 is an apocalyptic number.

131312256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

131312256 is an abundant number, since it is smaller than the sum of its proper divisors (217486944).

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

131312256 is an equidigital number, since it uses as much as digits as its factorization.

131312256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341976 (or 341964 counting only the distinct ones).

The product of its digits is 1080, while the sum is 24.

The square root of 131312256 is about 11459.1559898624. The cubic root of 131312256 is about 508.2785171624.

Adding to 131312256 its reverse (652213131), we get a palindrome (783525387).

The spelling of 131312256 in words is "one hundred thirty-one million, three hundred twelve thousand, two hundred fifty-six".