52161664 has 32 divisors (see below), whose sum is σ = 105692400. Its totient is φ = 25635072.

The previous prime is 52161647. The next prime is 52161667. The reversal of 52161664 is 46616125.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (52161667) 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, 4099 + ... + 11005.

Almost surely, 2^52161664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52161664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52846200).

52161664 is an abundant number, since it is smaller than the sum of its proper divisors (53530736).

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

52161664 is an equidigital number, since it uses as much as digits as its factorization.

52161664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6980 (or 6968 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 52161664 is about 7222.3032337337. The cubic root of 52161664 is about 373.6375185280.

Adding to 52161664 its reverse (46616125), we get a palindrome (98777789).

It can be divided in two parts, 52161 and 664, that added together give a palindrome (52825).

The spelling of 52161664 in words is "fifty-two million, one hundred sixty-one thousand, six hundred sixty-four".