228120449 has 2 divisors, whose sum is σ = 228120450. Its totient is φ = 228120448.

The previous prime is 228120391. The next prime is 228120457. The reversal of 228120449 is 944021822.

It is a happy number.

228120449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214095424 + 14025025 = 14632^2 + 3745^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228120449 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (228120499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114060224 + 114060225.

It is an arithmetic number, because the mean of its divisors is an integer number (114060225).

Almost surely, 2^228120449 is an apocalyptic number.

It is an amenable number.

228120449 is a deficient number, since it is larger than the sum of its proper divisors (1).

228120449 is an equidigital number, since it uses as much as digits as its factorization.

228120449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 228120449 is about 15103.6568088659. The cubic root of 228120449 is about 611.0190339644.

The spelling of 228120449 in words is "two hundred twenty-eight million, one hundred twenty thousand, four hundred forty-nine".