228209101 has 2 divisors, whose sum is σ = 228209102. Its totient is φ = 228209100.

The previous prime is 228209063. The next prime is 228209119. The reversal of 228209101 is 101902822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122633476 + 105575625 = 11074^2 + 10275^2 .

It is a cyclic number.

It is not a de Polignac number, because 228209101 - 2⁷ = 228208973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228209141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114104550 + 114104551.

It is an arithmetic number, because the mean of its divisors is an integer number (114104551).

Almost surely, 2^228209101 is an apocalyptic number.

It is an amenable number.

228209101 is a deficient number, since it is larger than the sum of its proper divisors (1).

228209101 is an equidigital number, since it uses as much as digits as its factorization.

228209101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 228209101 is about 15106.5913097561. The cubic root of 228209101 is about 611.0981749683.

The spelling of 228209101 in words is "two hundred twenty-eight million, two hundred nine thousand, one hundred one".