128513163 has 4 divisors (see below), whose sum is σ = 171350888. Its totient is φ = 85675440.

The previous prime is 128513159. The next prime is 128513179. The reversal of 128513163 is 361315821.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 128513163 - 2² = 128513159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128513163.

It is not an unprimeable number, because it can be changed into a prime (128513113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21418858 + ... + 21418863.

It is an arithmetic number, because the mean of its divisors is an integer number (42837722).

Almost surely, 2^128513163 is an apocalyptic number.

128513163 is a deficient number, since it is larger than the sum of its proper divisors (42837725).

128513163 is an equidigital number, since it uses as much as digits as its factorization.

128513163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42837724.

The product of its digits is 4320, while the sum is 30.

The square root of 128513163 is about 11336.3646289276. The cubic root of 128513163 is about 504.6410061736.

Adding to 128513163 its reverse (361315821), we get a palindrome (489828984).

The spelling of 128513163 in words is "one hundred twenty-eight million, five hundred thirteen thousand, one hundred sixty-three".