228197 has 2 divisors, whose sum is σ = 228198. Its totient is φ = 228196.

The previous prime is 228181. The next prime is 228199. The reversal of 228197 is 791822.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185761 + 42436 = 431^2 + 206^2 .

It is a cyclic number.

It is not a de Polignac number, because 228197 - 2⁴ = 228181 is a prime.

Together with 228199, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228199) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114098 + 114099.

It is an arithmetic number, because the mean of its divisors is an integer number (114099).

2²²⁸¹⁹⁷ is an apocalyptic number.

It is an amenable number.

228197 is a deficient number, since it is larger than the sum of its proper divisors (1).

228197 is an equidigital number, since it uses as much as digits as its factorization.

228197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 29.

The square root of 228197 is about 477.6996964621. The cubic root of 228197 is about 61.1087373428.

The spelling of 228197 in words is "two hundred twenty-eight thousand, one hundred ninety-seven".