228221214 has 64 divisors (see below), whose sum is σ = 503496000. Its totient is φ = 68539392.

The previous prime is 228221197. The next prime is 228221261. The reversal of 228221214 is 412122822.

228221214 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 848272 + ... + 848540.

It is an arithmetic number, because the mean of its divisors is an integer number (7867125).

Almost surely, 2^228221214 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228221214, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251748000).

228221214 is an abundant number, since it is smaller than the sum of its proper divisors (275274786).

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

228221214 is a wasteful number, since it uses less digits than its factorization.

228221214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509.

The product of its digits is 1024, while the sum is 24.

The square root of 228221214 is about 15106.9922221467. The cubic root of 228221214 is about 611.1089868380.

The spelling of 228221214 in words is "two hundred twenty-eight million, two hundred twenty-one thousand, two hundred fourteen".