228816587 has 2 divisors, whose sum is σ = 228816588. Its totient is φ = 228816586.

The previous prime is 228816527. The next prime is 228816589. The reversal of 228816587 is 785618822.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228816587 is a prime.

Together with 228816589, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (228816589) 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, 114408293 + 114408294.

It is an arithmetic number, because the mean of its divisors is an integer number (114408294).

Almost surely, 2^228816587 is an apocalyptic number.

228816587 is a deficient number, since it is larger than the sum of its proper divisors (1).

228816587 is an equidigital number, since it uses as much as digits as its factorization.

228816587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 430080, while the sum is 47.

The square root of 228816587 is about 15126.6846004007. The cubic root of 228816587 is about 611.6399364000.

The spelling of 228816587 in words is "two hundred twenty-eight million, eight hundred sixteen thousand, five hundred eighty-seven".