311231223 has 12 divisors (see below), whose sum is σ = 476000928. Its totient is φ = 195282240.

The previous prime is 311231209. The next prime is 311231233. The reversal of 311231223 is 322132113.

It is not a de Polignac number, because 311231223 - 2¹⁸ = 310969079 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311231196 and 311231205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311231233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1016943 + ... + 1017248.

It is an arithmetic number, because the mean of its divisors is an integer number (39666744).

Almost surely, 2^311231223 is an apocalyptic number.

311231223 is a deficient number, since it is larger than the sum of its proper divisors (164769705).

311231223 is a wasteful number, since it uses less digits than its factorization.

311231223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2034214 (or 2034211 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 311231223 is about 17641.7465972052. The cubic root of 311231223 is about 677.6847609091.

Adding to 311231223 its reverse (322132113), we get a palindrome (633363336).

The spelling of 311231223 in words is "three hundred eleven million, two hundred thirty-one thousand, two hundred twenty-three".