228521118 has 32 divisors (see below), whose sum is σ = 522814464. Its totient is φ = 65231712.

The previous prime is 228521099. The next prime is 228521129. The reversal of 228521118 is 811125822.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65371 + ... + 68777.

It is an arithmetic number, because the mean of its divisors is an integer number (16337952).

Almost surely, 2^228521118 is an apocalyptic number.

228521118 is an abundant number, since it is smaller than the sum of its proper divisors (294293346).

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

228521118 is a wasteful number, since it uses less digits than its factorization.

228521118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5016.

The product of its digits is 2560, while the sum is 30.

The square root of 228521118 is about 15116.9149630472. The cubic root of 228521118 is about 611.3765544394.

The spelling of 228521118 in words is "two hundred twenty-eight million, five hundred twenty-one thousand, one hundred eighteen".