228519225509 has 2 divisors, whose sum is σ = 228519225510. Its totient is φ = 228519225508.

The previous prime is 228519225491. The next prime is 228519225547. The reversal of 228519225509 is 905522915822.

228519225509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216827128609 + 11692096900 = 465647^2 + 108130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228519225509 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228519225589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114259612754 + 114259612755.

It is an arithmetic number, because the mean of its divisors is an integer number (114259612755).

Almost surely, 2^228519225509 is an apocalyptic number.

It is an amenable number.

228519225509 is a deficient number, since it is larger than the sum of its proper divisors (1).

228519225509 is an equidigital number, since it uses as much as digits as its factorization.

228519225509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296000, while the sum is 50.

The spelling of 228519225509 in words is "two hundred twenty-eight billion, five hundred nineteen million, two hundred twenty-five thousand, five hundred nine".