228111133 has 2 divisors, whose sum is σ = 228111134. Its totient is φ = 228111132.

The previous prime is 228111127. The next prime is 228111181. The reversal of 228111133 is 331111822.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 222994489 + 5116644 = 14933^2 + 2262^2 .

It is a cyclic number.

It is not a de Polignac number, because 228111133 - 2¹⁷ = 227980061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228112133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114055566 + 114055567.

It is an arithmetic number, because the mean of its divisors is an integer number (114055567).

Almost surely, 2^228111133 is an apocalyptic number.

It is an amenable number.

228111133 is a deficient number, since it is larger than the sum of its proper divisors (1).

228111133 is an equidigital number, since it uses as much as digits as its factorization.

228111133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 22.

The square root of 228111133 is about 15103.3484035826. The cubic root of 228111133 is about 611.0107162375.

Adding to 228111133 its reverse (331111822), we get a palindrome (559222955).

The spelling of 228111133 in words is "two hundred twenty-eight million, one hundred eleven thousand, one hundred thirty-three".