228118817 has 2 divisors, whose sum is σ = 228118818. Its totient is φ = 228118816.

The previous prime is 228118799. The next prime is 228118819. The reversal of 228118817 is 718811822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 227677921 + 440896 = 15089^2 + 664^2 .

It is a cyclic number.

It is not a de Polignac number, because 228118817 - 2¹⁶ = 228053281 is a prime.

It is a super-3 number, since 3×228118817³ (a number of 26 digits) contains 333 as substring.

Together with 228118819, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (228118819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114059408 + 114059409.

It is an arithmetic number, because the mean of its divisors is an integer number (114059409).

Almost surely, 2^228118817 is an apocalyptic number.

It is an amenable number.

228118817 is a deficient number, since it is larger than the sum of its proper divisors (1).

228118817 is an equidigital number, since it uses as much as digits as its factorization.

228118817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14336, while the sum is 38.

The square root of 228118817 is about 15103.6027821179. The cubic root of 228118817 is about 611.0175768608.

The spelling of 228118817 in words is "two hundred twenty-eight million, one hundred eighteen thousand, eight hundred seventeen".