228015289 has 2 divisors, whose sum is σ = 228015290. Its totient is φ = 228015288.

The previous prime is 228015239. The next prime is 228015317. The reversal of 228015289 is 982510822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 227496889 + 518400 = 15083^2 + 720^2 .

It is a cyclic number.

It is not a de Polignac number, because 228015289 - 2¹¹ = 228013241 is a prime.

It is not a weakly prime, because it can be changed into another prime (228015209) 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, 114007644 + 114007645.

It is an arithmetic number, because the mean of its divisors is an integer number (114007645).

Almost surely, 2^228015289 is an apocalyptic number.

It is an amenable number.

228015289 is a deficient number, since it is larger than the sum of its proper divisors (1).

228015289 is an equidigital number, since it uses as much as digits as its factorization.

228015289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 37.

The square root of 228015289 is about 15100.1751314347. The cubic root of 228015289 is about 610.9251294242.

The spelling of 228015289 in words is "two hundred twenty-eight million, fifteen thousand, two hundred eighty-nine".