225149 has 2 divisors, whose sum is σ = 225150. Its totient is φ = 225148.

The previous prime is 225143. The next prime is 225157. The reversal of 225149 is 941522.

225149 is nontrivially palindromic in base 7.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196249 + 28900 = 443^2 + 170^2 .

It is a cyclic number.

It is not a de Polignac number, because 225149 - 2⁴ = 225133 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112574 + 112575.

It is an arithmetic number, because the mean of its divisors is an integer number (112575).

2²²⁵¹⁴⁹ is an apocalyptic number.

It is an amenable number.

225149 is a deficient number, since it is larger than the sum of its proper divisors (1).

225149 is an equidigital number, since it uses as much as digits as its factorization.

225149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 23.

The square root of 225149 is about 474.4986828222. The cubic root of 225149 is about 60.8354428909.

The spelling of 225149 in words is "two hundred twenty-five thousand, one hundred forty-nine".