53208561 has 40 divisors (see below), whose sum is σ = 84702240. Its totient is φ = 29701056.

The previous prime is 53208527. The next prime is 53208577. The reversal of 53208561 is 16580235.

It is not a de Polignac number, because 53208561 - 2⁷ = 53208433 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53208511) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 597805 + ... + 597893.

It is an arithmetic number, because the mean of its divisors is an integer number (2117556).

Almost surely, 2^53208561 is an apocalyptic number.

It is an amenable number.

53208561 is a deficient number, since it is larger than the sum of its proper divisors (31493679).

53208561 is an frugal number, since it uses more digits than its factorization.

53208561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 53208561 is about 7294.4198535593. The cubic root of 53208561 is about 376.1206441927.

Adding to 53208561 its reverse (16580235), we get a palindrome (69788796).

The spelling of 53208561 in words is "fifty-three million, two hundred eight thousand, five hundred sixty-one".