228523649 has 2 divisors, whose sum is σ = 228523650. Its totient is φ = 228523648.

The previous prime is 228523643. The next prime is 228523657. The reversal of 228523649 is 946325822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 227406400 + 1117249 = 15080^2 + 1057^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228523649 is a prime.

It is not a weakly prime, because it can be changed into another prime (228523643) 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, 114261824 + 114261825.

It is an arithmetic number, because the mean of its divisors is an integer number (114261825).

Almost surely, 2^228523649 is an apocalyptic number.

It is an amenable number.

228523649 is a deficient number, since it is larger than the sum of its proper divisors (1).

228523649 is an equidigital number, since it uses as much as digits as its factorization.

228523649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 41.

The square root of 228523649 is about 15116.9986769861. The cubic root of 228523649 is about 611.3788115442.

The spelling of 228523649 in words is "two hundred twenty-eight million, five hundred twenty-three thousand, six hundred forty-nine".