228912197 has 4 divisors (see below), whose sum is σ = 229142796. Its totient is φ = 228681600.

The previous prime is 228912179. The next prime is 228912239. The reversal of 228912197 is 791219822.

228912197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 208109476 + 20802721 = 14426^2 + 4561^2 .

It is a cyclic number.

It is not a de Polignac number, because 228912197 - 2⁸ = 228911941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228912097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113804 + ... + 115797.

It is an arithmetic number, because the mean of its divisors is an integer number (57285699).

Almost surely, 2^228912197 is an apocalyptic number.

It is an amenable number.

228912197 is a deficient number, since it is larger than the sum of its proper divisors (230599).

228912197 is an equidigital number, since it uses as much as digits as its factorization.

228912197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230598.

The product of its digits is 36288, while the sum is 41.

The square root of 228912197 is about 15129.8445795058. The cubic root of 228912197 is about 611.7251148857.

The spelling of 228912197 in words is "two hundred twenty-eight million, nine hundred twelve thousand, one hundred ninety-seven".