228909396321 has 24 divisors (see below), whose sum is σ = 334483217640. Its totient is φ = 150836902656.

The previous prime is 228909396299. The next prime is 228909396337. The reversal of 228909396321 is 123693909822.

228909396321 is a `hidden beast` number, since 2 + 289 + 0 + 9 + 39 + 6 + 321 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1274490000 + 227634906321 = 35700^2 + 477111^2 .

It is not a de Polignac number, because 228909396321 - 2⁷ = 228909396193 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (228909398321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2222071 + ... + 2322803.

It is an arithmetic number, because the mean of its divisors is an integer number (13936800735).

Almost surely, 2^228909396321 is an apocalyptic number.

It is an amenable number.

228909396321 is a deficient number, since it is larger than the sum of its proper divisors (105573821319).

228909396321 is a wasteful number, since it uses less digits than its factorization.

228909396321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103665 (or 103662 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 54.

The spelling of 228909396321 in words is "two hundred twenty-eight billion, nine hundred nine million, three hundred ninety-six thousand, three hundred twenty-one".