52206561 has 24 divisors (see below), whose sum is σ = 82555200. Its totient is φ = 31528800.

The previous prime is 52206551. The next prime is 52206587. The reversal of 52206561 is 16560225.

52206561 is a `hidden beast` number, since 5 + 2 + 2 + 0 + 656 + 1 = 666.

It is not a de Polignac number, because 52206561 - 2¹⁰ = 52205537 is a prime.

It is a super-2 number, since 2×52206561² = 5451050022893442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (52206551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33796 + ... + 35306.

It is an arithmetic number, because the mean of its divisors is an integer number (3439800).

Almost surely, 2^52206561 is an apocalyptic number.

It is an amenable number.

52206561 is a deficient number, since it is larger than the sum of its proper divisors (30348639).

52206561 is a wasteful number, since it uses less digits than its factorization.

52206561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1877 (or 1874 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 52206561 is about 7225.4107841700. The cubic root of 52206561 is about 373.7446878661.

Adding to 52206561 its reverse (16560225), we get a palindrome (68766786).

It can be divided in two parts, 5220 and 6561, that added together give a triangular number (11781 = T₁₅₃).

The spelling of 52206561 in words is "fifty-two million, two hundred six thousand, five hundred sixty-one".