53343985 has 4 divisors (see below), whose sum is σ = 64012788. Its totient is φ = 42675184.

The previous prime is 53343971. The next prime is 53343991. The reversal of 53343985 is 58934335.

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 9678321 + 43665664 = 3111^2 + 6608^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53343985 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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5334394 + ... + 5334403.

It is an arithmetic number, because the mean of its divisors is an integer number (16003197).

Almost surely, 2^53343985 is an apocalyptic number.

It is an amenable number.

53343985 is a deficient number, since it is larger than the sum of its proper divisors (10668803).

53343985 is a wasteful number, since it uses less digits than its factorization.

53343985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10668802.

The product of its digits is 194400, while the sum is 40.

The square root of 53343985 is about 7303.6966667572. The cubic root of 53343985 is about 376.4394688896.

The spelling of 53343985 in words is "fifty-three million, three hundred forty-three thousand, nine hundred eighty-five".