225311 has 4 divisors (see below), whose sum is σ = 226512. Its totient is φ = 224112.

The previous prime is 225307. The next prime is 225341. The reversal of 225311 is 113522.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 225311 - 2² = 225307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 225311.

It is not an unprimeable number, because it can be changed into a prime (225341) 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, 251 + ... + 716.

It is an arithmetic number, because the mean of its divisors is an integer number (56628).

2²²⁵³¹¹ is an apocalyptic number.

225311 is a deficient number, since it is larger than the sum of its proper divisors (1201).

225311 is an equidigital number, since it uses as much as digits as its factorization.

225311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200.

The product of its digits is 60, while the sum is 14.

The square root of 225311 is about 474.6693586066. The cubic root of 225311 is about 60.8500302367.

Adding to 225311 its reverse (113522), we get a palindrome (338833).

The spelling of 225311 in words is "two hundred twenty-five thousand, three hundred eleven".