228055987 has 4 divisors (see below), whose sum is σ = 228097800. Its totient is φ = 228014176.

The previous prime is 228055967. The next prime is 228055991. The reversal of 228055987 is 789550822.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 228055987 - 2⁷ = 228055859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228055937) 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 in 3 ways as a sum of consecutive naturals, for example, 11233 + ... + 24130.

It is an arithmetic number, because the mean of its divisors is an integer number (57024450).

Almost surely, 2^228055987 is an apocalyptic number.

228055987 is a deficient number, since it is larger than the sum of its proper divisors (41813).

228055987 is an equidigital number, since it uses as much as digits as its factorization.

228055987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41812.

The product of its (nonzero) digits is 403200, while the sum is 46.

The square root of 228055987 is about 15101.5226715719. The cubic root of 228055987 is about 610.9614748697.

The spelling of 228055987 in words is "two hundred twenty-eight million, fifty-five thousand, nine hundred eighty-seven".