228100609 has 9 divisors (see below), whose sum is σ = 250904899. Its totient is φ = 207213160.

The previous prime is 228100601. The next prime is 228100627. The reversal of 228100609 is 906001822.

It is a happy number.

The square root of 228100609 is 15103.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 225450225 + 2650384 = 15015^2 + 1628^2 .

It is not a de Polignac number, because 228100609 - 2³ = 228100601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228100601) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 165447 + ... + 166819.

Almost surely, 2^228100609 is an apocalyptic number.

228100609 is the 15103-rd square number.

228100609 is the 7552-nd centered octagonal number.

It is an amenable number.

228100609 is a deficient number, since it is larger than the sum of its proper divisors (22804290).

228100609 is an frugal number, since it uses more digits than its factorization.

228100609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2768 (or 1384 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The cubic root of 228100609 is about 611.0013196836.

The spelling of 228100609 in words is "two hundred twenty-eight million, one hundred thousand, six hundred nine".