53178785 has 16 divisors (see below), whose sum is σ = 69757632. Its totient is φ = 38596800.

The previous prime is 53178781. The next prime is 53178799. The reversal of 53178785 is 58787135.

53178785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 53178785 - 2² = 53178781 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53178781) 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, 51575 + ... + 52595.

It is an arithmetic number, because the mean of its divisors is an integer number (4359852).

Almost surely, 2^53178785 is an apocalyptic number.

53178785 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

53178785 is a deficient number, since it is larger than the sum of its proper divisors (16578847).

53178785 is a wasteful number, since it uses less digits than its factorization.

53178785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1984.

The product of its digits is 235200, while the sum is 44.

The square root of 53178785 is about 7292.3785557251. The cubic root of 53178785 is about 376.0504709109.

The spelling of 53178785 in words is "fifty-three million, one hundred seventy-eight thousand, seven hundred eighty-five".