52660220 has 24 divisors (see below), whose sum is σ = 117092304. Its totient is φ = 19824896.

The previous prime is 52660219. The next prime is 52660249. The reversal of 52660220 is 2206625.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77102 + ... + 77781.

It is an arithmetic number, because the mean of its divisors is an integer number (4878846).

Almost surely, 2^52660220 is an apocalyptic number.

It is an amenable number.

52660220 is an abundant number, since it is smaller than the sum of its proper divisors (64432084).

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

52660220 is a wasteful number, since it uses less digits than its factorization.

52660220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154909 (or 154907 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 52660220 is about 7256.7361809563. The cubic root of 52660220 is about 374.8241427293.

Adding to 52660220 its reverse (2206625), we get a palindrome (54866845).

The spelling of 52660220 in words is "fifty-two million, six hundred sixty thousand, two hundred twenty".