52221228 has 24 divisors (see below), whose sum is σ = 126052080. Its totient is φ = 16806720.

The previous prime is 52221209. The next prime is 52221241. The reversal of 52221228 is 82212225.

52221228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 52221198 and 52221207.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74683 + ... + 75378.

It is an arithmetic number, because the mean of its divisors is an integer number (5252170).

Almost surely, 2^52221228 is an apocalyptic number.

52221228 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

52221228 is an abundant number, since it is smaller than the sum of its proper divisors (73830852).

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

52221228 is a wasteful number, since it uses less digits than its factorization.

52221228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150097 (or 150095 counting only the distinct ones).

The product of its digits is 1280, while the sum is 24.

The square root of 52221228 is about 7226.4256724884. The cubic root of 52221228 is about 373.7796847449.

The spelling of 52221228 in words is "fifty-two million, two hundred twenty-one thousand, two hundred twenty-eight".