52531640 has 64 divisors (see below), whose sum is σ = 136028160. Its totient is φ = 17884800.

The previous prime is 52531631. The next prime is 52531643. The reversal of 52531640 is 4613525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52531643) 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 15 ways as a sum of consecutive naturals, for example, 45065 + ... + 46215.

It is an arithmetic number, because the mean of its divisors is an integer number (2125440).

Almost surely, 2^52531640 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 52531640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68014080).

52531640 is an abundant number, since it is smaller than the sum of its proper divisors (83496520).

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

52531640 is a wasteful number, since it uses less digits than its factorization.

52531640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332 (or 1328 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 52531640 is about 7247.8714116629. The cubic root of 52531640 is about 374.5188258175.

The spelling of 52531640 in words is "fifty-two million, five hundred thirty-one thousand, six hundred forty".