52505220 has 96 divisors (see below), whose sum is σ = 153675648. Its totient is φ = 13381632.

The previous prime is 52505209. The next prime is 52505249. The reversal of 52505220 is 2250525.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 148564 + ... + 148916.

It is an arithmetic number, because the mean of its divisors is an integer number (1600788).

Almost surely, 2^52505220 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 52505220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76837824).

52505220 is an abundant number, since it is smaller than the sum of its proper divisors (101170428).

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

52505220 is a wasteful number, since it uses less digits than its factorization.

52505220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469 (or 467 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 52505220 is about 7246.0485783632. The cubic root of 52505220 is about 374.4560290810.

Adding to 52505220 its reverse (2250525), we get a palindrome (54755745).

It can be divided in two parts, 52505 and 220, that added together give a palindrome (52725).

The spelling of 52505220 in words is "fifty-two million, five hundred five thousand, two hundred twenty".