52491168 has 36 divisors (see below), whose sum is σ = 149272578. Its totient is φ = 17496960.

The previous prime is 52491157. The next prime is 52491191. The reversal of 52491168 is 86119425.

52491168 is a `hidden beast` number, since 5 + 2 + 491 + 168 = 666.

It can be written as a sum of positive squares in only one way, i.e., 40297104 + 12194064 = 6348^2 + 3492^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 90843 + ... + 91418.

Almost surely, 2^52491168 is an apocalyptic number.

It is an amenable number.

52491168 is an abundant number, since it is smaller than the sum of its proper divisors (96781410).

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

52491168 is a wasteful number, since it uses less digits than its factorization.

52491168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182277 (or 182266 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 52491168 is about 7245.0788815582. The cubic root of 52491168 is about 374.4226208116.

The spelling of 52491168 in words is "fifty-two million, four hundred ninety-one thousand, one hundred sixty-eight".