228521148 has 12 divisors (see below), whose sum is σ = 533216040. Its totient is φ = 76173712.

The previous prime is 228521129. The next prime is 228521159. The reversal of 228521148 is 841125822.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9521703 + ... + 9521726.

It is an arithmetic number, because the mean of its divisors is an integer number (44434670).

Almost surely, 2^228521148 is an apocalyptic number.

It is an amenable number.

228521148 is an abundant number, since it is smaller than the sum of its proper divisors (304694892).

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

228521148 is a wasteful number, since it uses less digits than its factorization.

228521148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19043436 (or 19043434 counting only the distinct ones).

The product of its digits is 10240, while the sum is 33.

The square root of 228521148 is about 15116.9159553131. The cubic root of 228521148 is about 611.3765811930.

The spelling of 228521148 in words is "two hundred twenty-eight million, five hundred twenty-one thousand, one hundred forty-eight".