225109 has 2 divisors, whose sum is σ = 225110. Its totient is φ = 225108.

The previous prime is 225089. The next prime is 225119. The reversal of 225109 is 901522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136900 + 88209 = 370^2 + 297^2 .

It is a cyclic number.

It is not a de Polignac number, because 225109 - 2⁵ = 225077 is a prime.

It is a Chen prime.

It is a nialpdrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112554 + 112555.

It is an arithmetic number, because the mean of its divisors is an integer number (112555).

2²²⁵¹⁰⁹ is an apocalyptic number.

It is an amenable number.

225109 is a deficient number, since it is larger than the sum of its proper divisors (1).

225109 is an equidigital number, since it uses as much as digits as its factorization.

225109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 225109 is about 474.4565312018. The cubic root of 225109 is about 60.8318400000.

The spelling of 225109 in words is "two hundred twenty-five thousand, one hundred nine".