311231310323 has 4 divisors (see below), whose sum is σ = 324763106448. Its totient is φ = 297699514200.

The previous prime is 311231310319. The next prime is 311231310337. The reversal of 311231310323 is 323013132113.

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 311231310323 - 2² = 311231310319 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 13531796101 = 311231310323 / (3 + 1 + 1 + 2 + 3 + 1 + 3 + 1 + 0 + 3 + 2 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311231310373) 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, 6765898028 + ... + 6765898073.

It is an arithmetic number, because the mean of its divisors is an integer number (81190776612).

Almost surely, 2^311231310323 is an apocalyptic number.

311231310323 is a deficient number, since it is larger than the sum of its proper divisors (13531796125).

311231310323 is a wasteful number, since it uses less digits than its factorization.

311231310323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13531796124.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 311231310323 its reverse (323013132113), we get a palindrome (634244442436).

The spelling of 311231310323 in words is "three hundred eleven billion, two hundred thirty-one million, three hundred ten thousand, three hundred twenty-three".