201220228 has 48 divisors (see below), whose sum is σ = 408409344. Its totient is φ = 85731840.

The previous prime is 201220223. The next prime is 201220247. The reversal of 201220228 is 822022102.

201220228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (201220223) 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, 274150 + ... + 274882.

It is an arithmetic number, because the mean of its divisors is an integer number (8508528).

Almost surely, 2^201220228 is an apocalyptic number.

It is an amenable number.

201220228 is an abundant number, since it is smaller than the sum of its proper divisors (207189116).

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

201220228 is a wasteful number, since it uses less digits than its factorization.

201220228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132 (or 1130 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 201220228 is about 14185.2115951790. The cubic root of 201220228 is about 585.9904598384.

The spelling of 201220228 in words is "two hundred one million, two hundred twenty thousand, two hundred twenty-eight".