321866228 has 6 divisors (see below), whose sum is σ = 563265906. Its totient is φ = 160933112.

The previous prime is 321866203. The next prime is 321866239. The reversal of 321866228 is 822668123.

It can be written as a sum of positive squares in only one way, i.e., 294534244 + 27331984 = 17162^2 + 5228^2 .

It is a junction number, because it is equal to n+sod(n) for n = 321866191 and 321866200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40233275 + ... + 40233282.

It is an arithmetic number, because the mean of its divisors is an integer number (93877651).

Almost surely, 2^321866228 is an apocalyptic number.

It is an amenable number.

321866228 is a deficient number, since it is larger than the sum of its proper divisors (241399678).

321866228 is a wasteful number, since it uses less digits than its factorization.

321866228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80466561 (or 80466559 counting only the distinct ones).

The product of its digits is 55296, while the sum is 38.

The square root of 321866228 is about 17940.6306466635. The cubic root of 321866228 is about 685.3174709000.

The spelling of 321866228 in words is "three hundred twenty-one million, eight hundred sixty-six thousand, two hundred twenty-eight".