228538663 has 2 divisors, whose sum is σ = 228538664. Its totient is φ = 228538662.

The previous prime is 228538643. The next prime is 228538697. The reversal of 228538663 is 366835822.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228538663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228538643) 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, 114269331 + 114269332.

It is an arithmetic number, because the mean of its divisors is an integer number (114269332).

Almost surely, 2^228538663 is an apocalyptic number.

228538663 is a deficient number, since it is larger than the sum of its proper divisors (1).

228538663 is an equidigital number, since it uses as much as digits as its factorization.

228538663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 414720, while the sum is 43.

The square root of 228538663 is about 15117.4952621127. The cubic root of 228538663 is about 611.3922004436.

The spelling of 228538663 in words is "two hundred twenty-eight million, five hundred thirty-eight thousand, six hundred sixty-three".