5255521220 has 24 divisors (see below), whose sum is σ = 11617468800. Its totient is φ = 1991565792.

The previous prime is 5255521217. The next prime is 5255521241. The reversal of 5255521220 is 221255525.

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, 6914780 + ... + 6915539.

It is an arithmetic number, because the mean of its divisors is an integer number (484061200).

Almost surely, 2^5255521220 is an apocalyptic number.

It is an amenable number.

5255521220 is an abundant number, since it is smaller than the sum of its proper divisors (6361947580).

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

5255521220 is a wasteful number, since it uses less digits than its factorization.

5255521220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13830347 (or 13830345 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 29.

The square root of 5255521220 is about 72494.9737568061. The cubic root of 5255521220 is about 1738.6223759025.

Adding to 5255521220 its reverse (221255525), we get a palindrome (5476776745).

The spelling of 5255521220 in words is "five billion, two hundred fifty-five million, five hundred twenty-one thousand, two hundred twenty".