228818961817 has 2 divisors, whose sum is σ = 228818961818. Its totient is φ = 228818961816.

The previous prime is 228818961773. The next prime is 228818961853. The reversal of 228818961817 is 718169818822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228379807881 + 439153936 = 477891^2 + 20956^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228818961817 is a prime.

It is not a weakly prime, because it can be changed into another prime (228818911817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114409480908 + 114409480909.

It is an arithmetic number, because the mean of its divisors is an integer number (114409480909).

Almost surely, 2^228818961817 is an apocalyptic number.

It is an amenable number.

228818961817 is a deficient number, since it is larger than the sum of its proper divisors (1).

228818961817 is an equidigital number, since it uses as much as digits as its factorization.

228818961817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6193152, while the sum is 61.

The spelling of 228818961817 in words is "two hundred twenty-eight billion, eight hundred eighteen million, nine hundred sixty-one thousand, eight hundred seventeen".