228643506503 has 2 divisors, whose sum is σ = 228643506504. Its totient is φ = 228643506502.

The previous prime is 228643506433. The next prime is 228643506551. The reversal of 228643506503 is 305605346822.

228643506503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 228643506503 - 2¹² = 228643502407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228643506583) 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 as a sum of consecutive naturals, namely, 114321753251 + 114321753252.

It is an arithmetic number, because the mean of its divisors is an integer number (114321753252).

Almost surely, 2^228643506503 is an apocalyptic number.

228643506503 is a deficient number, since it is larger than the sum of its proper divisors (1).

228643506503 is an equidigital number, since it uses as much as digits as its factorization.

228643506503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1036800, while the sum is 44.

The spelling of 228643506503 in words is "two hundred twenty-eight billion, six hundred forty-three million, five hundred six thousand, five hundred three".