53305643 has 4 divisors (see below), whose sum is σ = 54179568. Its totient is φ = 52431720.

The previous prime is 53305619. The next prime is 53305657. The reversal of 53305643 is 34650335.

It is a happy number.

53305643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 53305643 - 2⁶ = 53305579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53305613) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 436871 + ... + 436992.

It is an arithmetic number, because the mean of its divisors is an integer number (13544892).

Almost surely, 2^53305643 is an apocalyptic number.

53305643 is a deficient number, since it is larger than the sum of its proper divisors (873925).

53305643 is an equidigital number, since it uses as much as digits as its factorization.

53305643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873924.

The product of its (nonzero) digits is 16200, while the sum is 29.

The square root of 53305643 is about 7301.0713597389. The cubic root of 53305643 is about 376.3492562717.

Adding to 53305643 its reverse (34650335), we get a palindrome (87955978).

The spelling of 53305643 in words is "fifty-three million, three hundred five thousand, six hundred forty-three".