131255556 has 24 divisors (see below), whose sum is σ = 306460224. Its totient is φ = 43723680.

The previous prime is 131255543. The next prime is 131255557. The reversal of 131255556 is 655552131.

It is not an unprimeable number, because it can be changed into a prime (131255557) 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 7 ways as a sum of consecutive naturals, for example, 25366 + ... + 30098.

It is an arithmetic number, because the mean of its divisors is an integer number (12769176).

Almost surely, 2^131255556 is an apocalyptic number.

It is an amenable number.

131255556 is an abundant number, since it is smaller than the sum of its proper divisors (175204668).

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

131255556 is a wasteful number, since it uses less digits than its factorization.

131255556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7051 (or 7049 counting only the distinct ones).

The product of its digits is 22500, while the sum is 33.

The square root of 131255556 is about 11456.6817185431. The cubic root of 131255556 is about 508.2053492245.

It can be divided in two parts, 13125 and 5556, that added together give a palindrome (18681).

The spelling of 131255556 in words is "one hundred thirty-one million, two hundred fifty-five thousand, five hundred fifty-six".