228544961209 has 2 divisors, whose sum is σ = 228544961210. Its totient is φ = 228544961208.

The previous prime is 228544961179. The next prime is 228544961243. The reversal of 228544961209 is 902169445822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196071840000 + 32473121209 = 442800^2 + 180203^2 .

It is a cyclic number.

It is not a de Polignac number, because 228544961209 - 2²¹ = 228542864057 is a prime.

It is not a weakly prime, because it can be changed into another prime (228544961009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114272480604 + 114272480605.

It is an arithmetic number, because the mean of its divisors is an integer number (114272480605).

Almost surely, 2^228544961209 is an apocalyptic number.

It is an amenable number.

228544961209 is a deficient number, since it is larger than the sum of its proper divisors (1).

228544961209 is an equidigital number, since it uses as much as digits as its factorization.

228544961209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2488320, while the sum is 52.

The spelling of 228544961209 in words is "two hundred twenty-eight billion, five hundred forty-four million, nine hundred sixty-one thousand, two hundred nine".