52312520 has 64 divisors (see below), whose sum is σ = 131166000. Its totient is φ = 18643968.

The previous prime is 52312517. The next prime is 52312573. The reversal of 52312520 is 2521325.

52312520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 2553604 + 49758916 = 1598^2 + 7054^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 52312492 and 52312501.

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 15 ways as a sum of consecutive naturals, for example, 13346 + ... + 16814.

Almost surely, 2^52312520 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 52312520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65583000).

52312520 is an abundant number, since it is smaller than the sum of its proper divisors (78853480).

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

52312520 is a wasteful number, since it uses less digits than its factorization.

52312520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3522 (or 3518 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 52312520 is about 7232.7394533468. The cubic root of 52312520 is about 373.9973690798.

Adding to 52312520 its reverse (2521325), we get a palindrome (54833845).

The spelling of 52312520 in words is "fifty-two million, three hundred twelve thousand, five hundred twenty".