53556385 has 4 divisors (see below), whose sum is σ = 64267668. Its totient is φ = 42845104.

The previous prime is 53556379. The next prime is 53556401. The reversal of 53556385 is 58365535.

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 39955041 + 13601344 = 6321^2 + 3688^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53556385 is a prime.

It is a Duffinian 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, 5355634 + ... + 5355643.

It is an arithmetic number, because the mean of its divisors is an integer number (16066917).

Almost surely, 2^53556385 is an apocalyptic number.

It is an amenable number.

53556385 is a deficient number, since it is larger than the sum of its proper divisors (10711283).

53556385 is a wasteful number, since it uses less digits than its factorization.

53556385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10711282.

The product of its digits is 270000, while the sum is 40.

The square root of 53556385 is about 7318.2228033861. Note that the first 3 decimals coincide. The cubic root of 53556385 is about 376.9384308454.

The spelling of 53556385 in words is "fifty-three million, five hundred fifty-six thousand, three hundred eighty-five".