228751009 has 2 divisors, whose sum is σ = 228751010. Its totient is φ = 228751008.

The previous prime is 228751001. The next prime is 228751027. The reversal of 228751009 is 900157822.

228751009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186240609 + 42510400 = 13647^2 + 6520^2 .

It is a cyclic number.

It is not a de Polignac number, because 228751009 - 2³ = 228751001 is a prime.

It is not a weakly prime, because it can be changed into another prime (228751001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114375504 + 114375505.

It is an arithmetic number, because the mean of its divisors is an integer number (114375505).

Almost surely, 2^228751009 is an apocalyptic number.

It is an amenable number.

228751009 is a deficient number, since it is larger than the sum of its proper divisors (1).

228751009 is an equidigital number, since it uses as much as digits as its factorization.

228751009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 228751009 is about 15124.5168187285. The cubic root of 228751009 is about 611.5814995581.

The spelling of 228751009 in words is "two hundred twenty-eight million, seven hundred fifty-one thousand, nine".