228685229 has 2 divisors, whose sum is σ = 228685230. Its totient is φ = 228685228.

The previous prime is 228685199. The next prime is 228685231. The reversal of 228685229 is 922586822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170955625 + 57729604 = 13075^2 + 7598^2 .

It is a cyclic number.

It is not a de Polignac number, because 228685229 - 2¹² = 228681133 is a prime.

Together with 228685231, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228685229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228675229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114342614 + 114342615.

It is an arithmetic number, because the mean of its divisors is an integer number (114342615).

Almost surely, 2^228685229 is an apocalyptic number.

It is an amenable number.

228685229 is a deficient number, since it is larger than the sum of its proper divisors (1).

228685229 is an equidigital number, since it uses as much as digits as its factorization.

228685229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 276480, while the sum is 44.

The square root of 228685229 is about 15122.3420474475. The cubic root of 228685229 is about 611.5228714920.

The spelling of 228685229 in words is "two hundred twenty-eight million, six hundred eighty-five thousand, two hundred twenty-nine".