128371131 has 36 divisors (see below), whose sum is σ = 228399912. Its totient is φ = 69035904.

The previous prime is 128371127. The next prime is 128371151. The reversal of 128371131 is 131173821.

It is a happy number.

It is not a de Polignac number, because 128371131 - 2² = 128371127 is a prime.

It is a super-2 number, since 2×128371131² = 32958294548438322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 128371095 and 128371104.

It is not an unprimeable number, because it can be changed into a prime (128371151) 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 35 ways as a sum of consecutive naturals, for example, 1065 + ... + 16058.

It is an arithmetic number, because the mean of its divisors is an integer number (6344442).

Almost surely, 2^128371131 is an apocalyptic number.

128371131 is a deficient number, since it is larger than the sum of its proper divisors (100028781).

128371131 is a wasteful number, since it uses less digits than its factorization.

128371131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17160 (or 17150 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 128371131 is about 11330.0984550003. The cubic root of 128371131 is about 504.4550288752.

The spelling of 128371131 in words is "one hundred twenty-eight million, three hundred seventy-one thousand, one hundred thirty-one".