53611685 has 4 divisors (see below), whose sum is σ = 64334028. Its totient is φ = 42889344.

The previous prime is 53611651. The next prime is 53611697. The reversal of 53611685 is 58611635.

It is a Cunningham number, because it is equal to 7322²+1.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19307236 + 34304449 = 4394^2 + 5857^2 .

It is a cyclic number.

It is not a de Polignac number, because 53611685 - 2⁸ = 53611429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5361164 + ... + 5361173.

It is an arithmetic number, because the mean of its divisors is an integer number (16083507).

Almost surely, 2^53611685 is an apocalyptic number.

It is an amenable number.

53611685 is a deficient number, since it is larger than the sum of its proper divisors (10722343).

53611685 is a wasteful number, since it uses less digits than its factorization.

53611685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10722342.

The product of its digits is 21600, while the sum is 35.

The square root of 53611685 is about 7322.0000682874. Note that the first 4 decimals coincide. The cubic root of 53611685 is about 377.0681229752.

It can be divided in two parts, 536 and 11685, that added together give a palindrome (12221).

The spelling of 53611685 in words is "fifty-three million, six hundred eleven thousand, six hundred eighty-five".