131216256 has 48 divisors (see below), whose sum is σ = 377591760. Its totient is φ = 43738368.

The previous prime is 131216231. The next prime is 131216279. The reversal of 131216256 is 652612131.

131216256 is a `hidden beast` number, since 1 + 31 + 2 + 1 + 625 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55800 + ... + 58103.

It is an arithmetic number, because the mean of its divisors is an integer number (7866495).

Almost surely, 2^131216256 is an apocalyptic number.

131216256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

131216256 is an abundant number, since it is smaller than the sum of its proper divisors (246375504).

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

131216256 is a wasteful number, since it uses less digits than its factorization.

131216256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113923 (or 113908 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 131216256 is about 11454.9664338225. The cubic root of 131216256 is about 508.1546225746.

Adding to 131216256 its reverse (652612131), we get a palindrome (783828387).

The spelling of 131216256 in words is "one hundred thirty-one million, two hundred sixteen thousand, two hundred fifty-six".