131012556 has 12 divisors (see below), whose sum is σ = 305695992. Its totient is φ = 43670848.

The previous prime is 131012551. The next prime is 131012569. The reversal of 131012556 is 655210131.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (131012551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5458845 + ... + 5458868.

It is an arithmetic number, because the mean of its divisors is an integer number (25474666).

Almost surely, 2^131012556 is an apocalyptic number.

It is an amenable number.

131012556 is an abundant number, since it is smaller than the sum of its proper divisors (174683436).

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

131012556 is a wasteful number, since it uses less digits than its factorization.

131012556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10917720 (or 10917718 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 131012556 is about 11446.0716405237. The cubic root of 131012556 is about 507.8915334587.

Adding to 131012556 its reverse (655210131), we get a palindrome (786222687).

The spelling of 131012556 in words is "one hundred thirty-one million, twelve thousand, five hundred fifty-six".