52521340 has 24 divisors (see below), whose sum is σ = 110440512. Its totient is φ = 20980800.

The previous prime is 52521319. The next prime is 52521353. The reversal of 52521340 is 4312525.

52521340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 21165 + ... + 23515.

It is an arithmetic number, because the mean of its divisors is an integer number (4601688).

Almost surely, 2^52521340 is an apocalyptic number.

It is an amenable number.

52521340 is an abundant number, since it is smaller than the sum of its proper divisors (57919172).

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

52521340 is a wasteful number, since it uses less digits than its factorization.

52521340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3477 (or 3475 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 52521340 is about 7247.1608233846. The cubic root of 52521340 is about 374.4943466271.

Adding to 52521340 its reverse (4312525), we get a palindrome (56833865).

The spelling of 52521340 in words is "fifty-two million, five hundred twenty-one thousand, three hundred forty".