52161616 has 20 divisors (see below), whose sum is σ = 108837652. Its totient is φ = 24074496.

The previous prime is 52161589. The next prime is 52161617. The reversal of 52161616 is 61616125.

52161616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 29160000 + 23001616 = 5400^2 + 4796^2 .

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52161617) 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 3 ways as a sum of consecutive naturals, for example, 125181 + ... + 125596.

Almost surely, 2^52161616 is an apocalyptic number.

It is an amenable number.

52161616 is an abundant number, since it is smaller than the sum of its proper divisors (56676036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

52161616 is a wasteful number, since it uses less digits than its factorization.

52161616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250798 (or 250792 counting only the distinct ones).

The product of its digits is 2160, while the sum is 28.

The square root of 52161616 is about 7222.2999106933. The cubic root of 52161616 is about 373.6374039189.

The spelling of 52161616 in words is "fifty-two million, one hundred sixty-one thousand, six hundred sixteen".