311225 has 12 divisors (see below), whose sum is σ = 394320. Its totient is φ = 243600.

The previous prime is 311203. The next prime is 311237. The reversal of 311225 is 522113.

It is a happy number.

It is not a de Polignac number, because 311225 - 2⁸ = 310969 is a prime.

It is a super-2 number, since 2×311225² = 193722001250, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1370 + ... + 1580.

It is an arithmetic number, because the mean of its divisors is an integer number (32860).

2³¹¹²²⁵ is an apocalyptic number.

It is an amenable number.

311225 is a deficient number, since it is larger than the sum of its proper divisors (83095).

311225 is a wasteful number, since it uses less digits than its factorization.

311225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280 (or 275 counting only the distinct ones).

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

The square root of 311225 is about 557.8754341249. The cubic root of 311225 is about 67.7680244160.

Adding to 311225 its reverse (522113), we get a palindrome (833338).

The spelling of 311225 in words is "three hundred eleven thousand, two hundred twenty-five".