311230223 has 4 divisors (see below), whose sum is σ = 314438880. Its totient is φ = 308021568.

The previous prime is 311230159. The next prime is 311230247. The reversal of 311230223 is 322032113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 311230223 - 2⁶ = 311230159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311220223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1604183 + ... + 1604376.

It is an arithmetic number, because the mean of its divisors is an integer number (78609720).

Almost surely, 2^311230223 is an apocalyptic number.

311230223 is a deficient number, since it is larger than the sum of its proper divisors (3208657).

311230223 is an equidigital number, since it uses as much as digits as its factorization.

311230223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3208656.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 311230223 is about 17641.7182553174. The cubic root of 311230223 is about 677.6840350977.

Adding to 311230223 its reverse (322032113), we get a palindrome (633262336).

The spelling of 311230223 in words is "three hundred eleven million, two hundred thirty thousand, two hundred twenty-three".