225697 has 2 divisors, whose sum is σ = 225698. Its totient is φ = 225696.

The previous prime is 225689. The next prime is 225721. The reversal of 225697 is 796522.

225697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197136 + 28561 = 444^2 + 169^2 .

It is a cyclic number.

It is not a de Polignac number, because 225697 - 2³ = 225689 is a prime.

It is an Ulam number.

225697 is a lucky number.

It is a nialpdrome in base 12.

It is not a weakly prime, because it can be changed into another prime (225637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112848 + 112849.

It is an arithmetic number, because the mean of its divisors is an integer number (112849).

2²²⁵⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

225697 is a deficient number, since it is larger than the sum of its proper divisors (1).

225697 is an equidigital number, since it uses as much as digits as its factorization.

225697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 31.

The square root of 225697 is about 475.0757834283. The cubic root of 225697 is about 60.8847595831.

The spelling of 225697 in words is "two hundred twenty-five thousand, six hundred ninety-seven".