225569 has 2 divisors, whose sum is σ = 225570. Its totient is φ = 225568.

The previous prime is 225529. The next prime is 225581. The reversal of 225569 is 965522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 180625 + 44944 = 425^2 + 212^2 .

It is a cyclic number.

It is not a de Polignac number, because 225569 - 2¹⁶ = 160033 is a prime.

It is a super-2 number, since 2×225569² = 101762747522, which contains 22 as substring.

It is a Chen prime.

It is a plaindrome in base 10.

It is a nialpdrome in base 12.

It is not a weakly prime, because it can be changed into another prime (225509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112784 + 112785.

It is an arithmetic number, because the mean of its divisors is an integer number (112785).

2²²⁵⁵⁶⁹ is an apocalyptic number.

It is an amenable number.

225569 is a deficient number, since it is larger than the sum of its proper divisors (1).

225569 is an equidigital number, since it uses as much as digits as its factorization.

225569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 29.

The square root of 225569 is about 474.9410489734. The cubic root of 225569 is about 60.8732475072.

The spelling of 225569 in words is "two hundred twenty-five thousand, five hundred sixty-nine".