53816565 has 48 divisors (see below), whose sum is σ = 95760000. Its totient is φ = 25787520.

The previous prime is 53816563. The next prime is 53816593. The reversal of 53816565 is 56561835.

It is not a de Polignac number, because 53816565 - 2¹ = 53816563 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53816561) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 270336 + ... + 270534.

It is an arithmetic number, because the mean of its divisors is an integer number (1995000).

Almost surely, 2^53816565 is an apocalyptic number.

53816565 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

53816565 is a deficient number, since it is larger than the sum of its proper divisors (41943435).

53816565 is a wasteful number, since it uses less digits than its factorization.

53816565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378 (or 367 counting only the distinct ones).

The product of its digits is 108000, while the sum is 39.

The square root of 53816565 is about 7335.9774399871. The cubic root of 53816565 is about 377.5478412534.

It can be divided in two parts, 53 and 816565, that added together give a palindrome (816618).

The spelling of 53816565 in words is "fifty-three million, eight hundred sixteen thousand, five hundred sixty-five".