53206563 has 4 divisors (see below), whose sum is σ = 70942088. Its totient is φ = 35471040.

The previous prime is 53206501. The next prime is 53206577. The reversal of 53206563 is 36560235.

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

It is not a de Polignac number, because 53206563 - 2¹² = 53202467 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53206563.

It is not an unprimeable number, because it can be changed into a prime (53206463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8867758 + ... + 8867763.

It is an arithmetic number, because the mean of its divisors is an integer number (17735522).

Almost surely, 2^53206563 is an apocalyptic number.

53206563 is a deficient number, since it is larger than the sum of its proper divisors (17735525).

53206563 is a wasteful number, since it uses less digits than its factorization.

53206563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17735524.

The product of its (nonzero) digits is 16200, while the sum is 30.

The square root of 53206563 is about 7294.2828982704. The cubic root of 53206563 is about 376.1159363134.

Adding to 53206563 its reverse (36560235), we get a palindrome (89766798).

The spelling of 53206563 in words is "fifty-three million, two hundred six thousand, five hundred sixty-three".