52781172 has 12 divisors (see below), whose sum is σ = 123156096. Its totient is φ = 17593720.

The previous prime is 52781171. The next prime is 52781249. The reversal of 52781172 is 27118725.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52781171) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2199204 + ... + 2199227.

It is an arithmetic number, because the mean of its divisors is an integer number (10263008).

Almost surely, 2^52781172 is an apocalyptic number.

It is an amenable number.

52781172 is an abundant number, since it is smaller than the sum of its proper divisors (70374924).

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

52781172 is a wasteful number, since it uses less digits than its factorization.

52781172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4398438 (or 4398436 counting only the distinct ones).

The product of its digits is 7840, while the sum is 33.

The square root of 52781172 is about 7265.0651752066. The cubic root of 52781172 is about 375.1108934261.

Adding to 52781172 its reverse (27118725), we get a palindrome (79899897).

It can be divided in two parts, 5278 and 1172, that multiplied together give a palindrome (6185816).

The spelling of 52781172 in words is "fifty-two million, seven hundred eighty-one thousand, one hundred seventy-two".