228381456209987 has 6 divisors (see below), whose sum is σ = 238742807721012. Its totient is φ = 218451827678612.

The previous prime is 228381456209957. The next prime is 228381456209993. The reversal of 228381456209987 is 789902654183822.

It is not a de Polignac number, because 228381456209987 - 2³⁰ = 228380382468163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228381456209957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 215861489273 + ... + 215861490330.

It is an arithmetic number, because the mean of its divisors is an integer number (39790467953502).

It is a 1-persistent number, because it is pandigital, but 2⋅228381456209987 = 456762912419974 is not.

Almost surely, 2^{228381456209987} is an apocalyptic number.

228381456209987 is a deficient number, since it is larger than the sum of its proper divisors (10361351511025).

228381456209987 is an equidigital number, since it uses as much as digits as its factorization.

228381456209987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431722979649 (or 431722979626 counting only the distinct ones).

The product of its (nonzero) digits is 836075520, while the sum is 74.

The spelling of 228381456209987 in words is "two hundred twenty-eight trillion, three hundred eighty-one billion, four hundred fifty-six million, two hundred nine thousand, nine hundred eighty-seven".