228919491522 has 30 divisors (see below), whose sum is σ = 512962876899. Its totient is φ = 76304467260.

The previous prime is 228919491503. The next prime is 228919491659. The reversal of 228919491522 is 225194919822.

228919491522 is a `hidden beast` number, since 2 + 28 + 9 + 1 + 9 + 4 + 91 + 522 = 666.

228919491522 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 114459745761 + 114459745761 = 338319^2 + 338319^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=338319.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 6070947 + ... + 6108537.

Almost surely, 2^228919491522 is an apocalyptic number.

228919491522 is an abundant number, since it is smaller than the sum of its proper divisors (284043385377).

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

228919491522 is an frugal number, since it uses more digits than its factorization.

228919491522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75196 (or 37596 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The spelling of 228919491522 in words is "two hundred twenty-eight billion, nine hundred nineteen million, four hundred ninety-one thousand, five hundred twenty-two".