53128189 has 16 divisors (see below), whose sum is σ = 56383488. Its totient is φ = 49997952.

The previous prime is 53128181. The next prime is 53128241. The reversal of 53128189 is 98182135.

It is not a de Polignac number, because 53128189 - 2³ = 53128181 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53128181) 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 15 ways as a sum of consecutive naturals, for example, 238132 + ... + 238354.

It is an arithmetic number, because the mean of its divisors is an integer number (3523968).

Almost surely, 2^53128189 is an apocalyptic number.

It is an amenable number.

53128189 is a deficient number, since it is larger than the sum of its proper divisors (3255299).

53128189 is a wasteful number, since it uses less digits than its factorization.

53128189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444.

The product of its digits is 17280, while the sum is 37.

The square root of 53128189 is about 7288.9086288689. The cubic root of 53128189 is about 375.9311709118.

The spelling of 53128189 in words is "fifty-three million, one hundred twenty-eight thousand, one hundred eighty-nine".