228521252 has 12 divisors (see below), whose sum is σ = 401923200.
Its totient is φ = 113686056.
The previous prime is 228521231. The next prime is 228521263. The reversal of 228521252 is 252125822.
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, 142748 + ... + 144339.
It is an arithmetic number, because the mean of its divisors is an integer number (33493600).
Almost surely, 2228521252 is an apocalyptic number.
It is an amenable number.
228521252 is a deficient number, since it is larger than the sum of its proper divisors (173401948).
228521252 is a wasteful number, since it uses less digits than its factorization.
228521252 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 287290 (or 287288 counting only the distinct ones).
The product of its digits is 6400, while the sum is 29.
The square root of 228521252 is about 15116.9193951678.
The cubic root of 228521252 is about 611.3766739388.
The spelling of 228521252 in words is "two hundred twenty-eight million, five hundred twenty-one thousand, two hundred fifty-two".