52621530 has 96 divisors (see below), whose sum is σ = 139454784. Its totient is φ = 12699648.

The previous prime is 52621523. The next prime is 52621553. The reversal of 52621530 is 3512625.

52621530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 52621530.

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 47 ways as a sum of consecutive naturals, for example, 491737 + ... + 491843.

It is an arithmetic number, because the mean of its divisors is an integer number (1452654).

Almost surely, 2^52621530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52621530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69727392).

52621530 is an abundant number, since it is smaller than the sum of its proper divisors (86833254).

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

52621530 is a wasteful number, since it uses less digits than its factorization.

52621530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240 (or 227 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 52621530 is about 7254.0698921364. The cubic root of 52621530 is about 374.7323245339.

The spelling of 52621530 in words is "fifty-two million, six hundred twenty-one thousand, five hundred thirty".