228521801250 has 90 divisors (see below), whose sum is σ = 618852468663. Its totient is φ = 60925626000.

The previous prime is 228521801243. The next prime is 228521801269. The reversal of 228521801250 is 52108125822.

228521801250 is a `hidden beast` number, since 2 + 2 + 8 + 521 + 8 + 0 + 125 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 52834240449 + 175687560801 = 229857^2 + 419151^2 .

It is a tau number, because it is divible by the number of its divisors (90).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=338025.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 50701497 + ... + 50706003.

Almost surely, 2^228521801250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228521801250

228521801250 is an abundant number, since it is smaller than the sum of its proper divisors (390330667413).

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

228521801250 is an frugal number, since it uses more digits than its factorization.

228521801250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9042 (or 4517 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 36.

The spelling of 228521801250 in words is "two hundred twenty-eight billion, five hundred twenty-one million, eight hundred one thousand, two hundred fifty".