228143081 has 2 divisors, whose sum is σ = 228143082. Its totient is φ = 228143080.

The previous prime is 228143053. The next prime is 228143099. The reversal of 228143081 is 180341822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 218005225 + 10137856 = 14765^2 + 3184^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228143081 is a prime.

It is a super-2 number, since 2×228143081² = 104098530816345122, which contains 22 as substring.

It is equal to p_12546038 and since 228143081 and 12546038 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (228143011) 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, 114071540 + 114071541.

It is an arithmetic number, because the mean of its divisors is an integer number (114071541).

Almost surely, 2^228143081 is an apocalyptic number.

It is an amenable number.

228143081 is a deficient number, since it is larger than the sum of its proper divisors (1).

228143081 is an equidigital number, since it uses as much as digits as its factorization.

228143081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 228143081 is about 15104.4060128163. The cubic root of 228143081 is about 611.0392398477.

The spelling of 228143081 in words is "two hundred twenty-eight million, one hundred forty-three thousand, eighty-one".