225949 has 2 divisors, whose sum is σ = 225950. Its totient is φ = 225948.

The previous prime is 225943. The next prime is 225961. The reversal of 225949 is 949522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225625 + 324 = 475^2 + 18^2 .

It is a cyclic number.

It is not a de Polignac number, because 225949 - 2³ = 225941 is a prime.

225949 is a lucky number.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 225949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112974 + 112975.

It is an arithmetic number, because the mean of its divisors is an integer number (112975).

2²²⁵⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

225949 is a deficient number, since it is larger than the sum of its proper divisors (1).

225949 is an equidigital number, since it uses as much as digits as its factorization.

225949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 31.

The square root of 225949 is about 475.3409302806. The cubic root of 225949 is about 60.9074112689.

The spelling of 225949 in words is "two hundred twenty-five thousand, nine hundred forty-nine".