131115128 has 16 divisors (see below), whose sum is σ = 246385680. Its totient is φ = 65412288.

The previous prime is 131115109. The next prime is 131115139. The reversal of 131115128 is 821511131.

It is a congruent number.

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, 14276 + ... + 21587.

It is an arithmetic number, because the mean of its divisors is an integer number (15399105).

Almost surely, 2^131115128 is an apocalyptic number.

It is an amenable number.

131115128 is a deficient number, since it is larger than the sum of its proper divisors (115270552).

131115128 is a wasteful number, since it uses less digits than its factorization.

131115128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36326 (or 36322 counting only the distinct ones).

The product of its digits is 240, while the sum is 23.

The square root of 131115128 is about 11450.5514277698. The cubic root of 131115128 is about 508.0240445767.

Adding to 131115128 its reverse (821511131), we get a palindrome (952626259).

The spelling of 131115128 in words is "one hundred thirty-one million, one hundred fifteen thousand, one hundred twenty-eight".