228816647 has 2 divisors, whose sum is σ = 228816648. Its totient is φ = 228816646.

The previous prime is 228816589. The next prime is 228816649. The reversal of 228816647 is 746618822.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 228816647 - 2⁸ = 228816391 is a prime.

Together with 228816649, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 228816598 and 228816607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228816649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114408323 + 114408324.

It is an arithmetic number, because the mean of its divisors is an integer number (114408324).

Almost surely, 2^228816647 is an apocalyptic number.

228816647 is a deficient number, since it is larger than the sum of its proper divisors (1).

228816647 is an equidigital number, since it uses as much as digits as its factorization.

228816647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 258048, while the sum is 44.

The square root of 228816647 is about 15126.6865836508. The cubic root of 228816647 is about 611.6399898611.

The spelling of 228816647 in words is "two hundred twenty-eight million, eight hundred sixteen thousand, six hundred forty-seven".