52116220 has 72 divisors (see below), whose sum is σ = 125619984. Its totient is φ = 18091008.

The previous prime is 52116217. The next prime is 52116241. The reversal of 52116220 is 2261125.

It is a super-2 number, since 2×52116220² = 5432200774176800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57007 + ... + 57913.

It is an arithmetic number, because the mean of its divisors is an integer number (1744722).

Almost surely, 2^52116220 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 52116220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62809992).

52116220 is an abundant number, since it is smaller than the sum of its proper divisors (73503764).

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

52116220 is a wasteful number, since it uses less digits than its factorization.

52116220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959 (or 944 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 52116220 is about 7219.1564604184. The cubic root of 52116220 is about 373.5289808561.

Adding to 52116220 its reverse (2261125), we get a palindrome (54377345).

The spelling of 52116220 in words is "fifty-two million, one hundred sixteen thousand, two hundred twenty".