228511117 has 2 divisors, whose sum is σ = 228511118. Its totient is φ = 228511116.

The previous prime is 228511111. The next prime is 228511123. The reversal of 228511117 is 711115822.

It is a balanced prime because it is at equal distance from previous prime (228511111) and next prime (228511123).

It can be written as a sum of positive squares in only one way, i.e., 180472356 + 48038761 = 13434^2 + 6931^2 .

It is a cyclic number.

It is not a de Polignac number, because 228511117 - 2³ = 228511109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228511111) 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, 114255558 + 114255559.

It is an arithmetic number, because the mean of its divisors is an integer number (114255559).

Almost surely, 2^228511117 is an apocalyptic number.

It is an amenable number.

228511117 is a deficient number, since it is larger than the sum of its proper divisors (1).

228511117 is an equidigital number, since it uses as much as digits as its factorization.

228511117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1120, while the sum is 28.

The square root of 228511117 is about 15116.5841710355. The cubic root of 228511117 is about 611.3676355465.

Adding to 228511117 its reverse (711115822), we get a palindrome (939626939).

The spelling of 228511117 in words is "two hundred twenty-eight million, five hundred eleven thousand, one hundred seventeen".