225669 has 4 divisors (see below), whose sum is σ = 300896. Its totient is φ = 150444.

The previous prime is 225637. The next prime is 225671. The reversal of 225669 is 966522.

225669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 225669 - 2⁵ = 225637 is a prime.

It is a super-2 number, since 2×225669² = 101852995122, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

225669 is a lucky number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37609 + ... + 37614.

It is an arithmetic number, because the mean of its divisors is an integer number (75224).

2²²⁵⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

225669 is a deficient number, since it is larger than the sum of its proper divisors (75227).

225669 is an equidigital number, since it uses as much as digits as its factorization.

225669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75226.

The product of its digits is 6480, while the sum is 30.

The square root of 225669 is about 475.0463135316. The cubic root of 225669 is about 60.8822416885.

The spelling of 225669 in words is "two hundred twenty-five thousand, six hundred sixty-nine".