52507220 has 48 divisors (see below), whose sum is σ = 117346320. Its totient is φ = 19666944.

The previous prime is 52507219. The next prime is 52507223. The reversal of 52507220 is 2270525.

It can be written as a sum of positive squares in 8 ways, for example, as 31684 + 52475536 = 178^2 + 7244^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52507223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132062 + ... + 132458.

It is an arithmetic number, because the mean of its divisors is an integer number (2444715).

Almost surely, 2^52507220 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 52507220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58673160).

52507220 is an abundant number, since it is smaller than the sum of its proper divisors (64839100).

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

52507220 is a wasteful number, since it uses less digits than its factorization.

52507220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812 (or 810 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 52507220 is about 7246.1865833002. The cubic root of 52507220 is about 374.4607835451.

Adding to 52507220 its reverse (2270525), we get a palindrome (54777745).

The spelling of 52507220 in words is "fifty-two million, five hundred seven thousand, two hundred twenty".