228826121 has 2 divisors, whose sum is σ = 228826122. Its totient is φ = 228826120.

The previous prime is 228826111. The next prime is 228826141. The reversal of 228826121 is 121628822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125193721 + 103632400 = 11189^2 + 10180^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228826121 is a prime.

It is a super-2 number, since 2×228826121² = 104722787303813282, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (228826111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114413060 + 114413061.

It is an arithmetic number, because the mean of its divisors is an integer number (114413061).

Almost surely, 2^228826121 is an apocalyptic number.

It is an amenable number.

228826121 is a deficient number, since it is larger than the sum of its proper divisors (1).

228826121 is an equidigital number, since it uses as much as digits as its factorization.

228826121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6144, while the sum is 32.

The square root of 228826121 is about 15126.9997355722. Note that the first 3 decimals coincide. The cubic root of 228826121 is about 611.6484312593.

The spelling of 228826121 in words is "two hundred twenty-eight million, eight hundred twenty-six thousand, one hundred twenty-one".