225689 has 2 divisors, whose sum is σ = 225690.
Its totient is φ = 225688.
The previous prime is 225683. The next prime is 225697. The reversal of 225689 is 986522.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 225625 + 64 = 475^2 + 8^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-225689 is a prime.
It is a Chen prime.
It is a plaindrome in base 10.
It is not a weakly prime, because it can be changed into another prime (225683) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112844 + 112845.
It is an arithmetic number, because the mean of its divisors is an integer number (112845).
2225689 is an apocalyptic number.
It is an amenable number.
225689 is a deficient number, since it is larger than the sum of its proper divisors (1).
225689 is an equidigital number, since it uses as much as digits as its factorization.
225689 is an evil number, because the sum of its binary digits is even.
The product of its digits is 8640, while the sum is 32.
The square root of 225689 is about 475.0673636444.
The cubic root of 225689 is about 60.8840402059.
The spelling of 225689 in words is "two hundred twenty-five thousand, six hundred eighty-nine".