115428131 has 16 divisors (see below), whose sum is σ = 144480000. Its totient is φ = 89775648.

The previous prime is 115428121. The next prime is 115428143. The reversal of 115428131 is 131824511.

It is a cyclic number.

It is not a de Polignac number, because 115428131 - 2⁶ = 115428067 is a prime.

It is a super-2 number, since 2×115428131² = 26647306852306322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 115428131.

It is not an unprimeable number, because it can be changed into a prime (115428101) 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 15 ways as a sum of consecutive naturals, for example, 5381 + ... + 16118.

It is an arithmetic number, because the mean of its divisors is an integer number (9030000).

Almost surely, 2^115428131 is an apocalyptic number.

115428131 is a deficient number, since it is larger than the sum of its proper divisors (29051869).

115428131 is a wasteful number, since it uses less digits than its factorization.

115428131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21578.

The product of its digits is 960, while the sum is 26.

The square root of 115428131 is about 10743.7484613146. The cubic root of 115428131 is about 486.8971374037.

The spelling of 115428131 in words is "one hundred fifteen million, four hundred twenty-eight thousand, one hundred thirty-one".