228815663 has 2 divisors, whose sum is σ = 228815664. Its totient is φ = 228815662.

The previous prime is 228815647. The next prime is 228815669. The reversal of 228815663 is 366518822.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 228815663 - 2⁴ = 228815647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228815663.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228815669) 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, 114407831 + 114407832.

It is an arithmetic number, because the mean of its divisors is an integer number (114407832).

Almost surely, 2^228815663 is an apocalyptic number.

228815663 is a deficient number, since it is larger than the sum of its proper divisors (1).

228815663 is an equidigital number, since it uses as much as digits as its factorization.

228815663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 41.

The square root of 228815663 is about 15126.6540583171. The cubic root of 228815663 is about 611.6391130971.

The spelling of 228815663 in words is "two hundred twenty-eight million, eight hundred fifteen thousand, six hundred sixty-three".