53385665 has 16 divisors (see below), whose sum is σ = 66491280. Its totient is φ = 41099520.

The previous prime is 53385641. The next prime is 53385677. The reversal of 53385665 is 56658335.

53385665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 1098304 + 52287361 = 1048^2 + 7231^2 .

It is not a de Polignac number, because 53385665 - 2¹² = 53381569 is a prime.

It is an unprimeable number.

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, 80435 + ... + 81095.

It is an arithmetic number, because the mean of its divisors is an integer number (4155705).

Almost surely, 2^53385665 is an apocalyptic number.

It is an amenable number.

53385665 is a deficient number, since it is larger than the sum of its proper divisors (13105615).

53385665 is a wasteful number, since it uses less digits than its factorization.

53385665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252.

The product of its digits is 324000, while the sum is 41.

The square root of 53385665 is about 7306.5494592181. The cubic root of 53385665 is about 376.5374862662.

The spelling of 53385665 in words is "fifty-three million, three hundred eighty-five thousand, six hundred sixty-five".