228485239 has 2 divisors, whose sum is σ = 228485240. Its totient is φ = 228485238.

The previous prime is 228485237. The next prime is 228485263. The reversal of 228485239 is 932584822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228485239 - 2¹ = 228485237 is a prime.

Together with 228485237, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 228485195 and 228485204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228485237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114242619 + 114242620.

It is an arithmetic number, because the mean of its divisors is an integer number (114242620).

Almost surely, 2^228485239 is an apocalyptic number.

228485239 is a deficient number, since it is larger than the sum of its proper divisors (1).

228485239 is an equidigital number, since it uses as much as digits as its factorization.

228485239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 43.

The square root of 228485239 is about 15115.7281994616. The cubic root of 228485239 is about 611.3445563354.

The spelling of 228485239 in words is "two hundred twenty-eight million, four hundred eighty-five thousand, two hundred thirty-nine".