53206643 has 16 divisors (see below), whose sum is σ = 63243264. Its totient is φ = 43813440.

The previous prime is 53206639. The next prime is 53206661. The reversal of 53206643 is 34660235.

It is a cyclic number.

It is not a de Polignac number, because 53206643 - 2² = 53206639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53206693) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 17846 + ... + 20612.

It is an arithmetic number, because the mean of its divisors is an integer number (3952704).

Almost surely, 2^53206643 is an apocalyptic number.

53206643 is a deficient number, since it is larger than the sum of its proper divisors (10036621).

53206643 is a wasteful number, since it uses less digits than its factorization.

53206643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2882.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 53206643 is about 7294.2883820151. The cubic root of 53206643 is about 376.1161248194.

Adding to 53206643 its reverse (34660235), we get a palindrome (87866878).

The spelling of 53206643 in words is "fifty-three million, two hundred six thousand, six hundred forty-three".