228730231 has 2 divisors, whose sum is σ = 228730232. Its totient is φ = 228730230.

The previous prime is 228730217. The next prime is 228730253. The reversal of 228730231 is 132037822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228730231 - 2⁹ = 228729719 is a prime.

It is a super-2 number, since 2×228730231² = 104635037146626722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 228730231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228730211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114365115 + 114365116.

It is an arithmetic number, because the mean of its divisors is an integer number (114365116).

Almost surely, 2^228730231 is an apocalyptic number.

228730231 is a deficient number, since it is larger than the sum of its proper divisors (1).

228730231 is an equidigital number, since it uses as much as digits as its factorization.

228730231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 228730231 is about 15123.8299051530. The cubic root of 228730231 is about 611.5629818617.

The spelling of 228730231 in words is "two hundred twenty-eight million, seven hundred thirty thousand, two hundred thirty-one".