52116561 has 32 divisors (see below), whose sum is σ = 90132480. Its totient is φ = 29142288.

The previous prime is 52116541. The next prime is 52116587. The reversal of 52116561 is 16561125.

It is a happy number.

52116561 is a `hidden beast` number, since 5 + 2 + 1 + 1 + 656 + 1 = 666.

52116561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 52116561 - 2¹⁴ = 52100177 is a prime.

It is a super-2 number, since 2×52116561² = 5432271860933442, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (52116541) 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 31 ways as a sum of consecutive naturals, for example, 5950 + ... + 11816.

It is an arithmetic number, because the mean of its divisors is an integer number (2816640).

Almost surely, 2^52116561 is an apocalyptic number.

It is an amenable number.

52116561 is a deficient number, since it is larger than the sum of its proper divisors (38015919).

52116561 is a wasteful number, since it uses less digits than its factorization.

52116561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5930 (or 5924 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 52116561 is about 7219.1800780975. The cubic root of 52116561 is about 373.5297955295.

Adding to 52116561 its reverse (16561125), we get a palindrome (68677686).

The spelling of 52116561 in words is "fifty-two million, one hundred sixteen thousand, five hundred sixty-one".