311131322231 has 8 divisors (see below), whose sum is σ = 327511932720. Its totient is φ = 294751239552.

The previous prime is 311131322221. The next prime is 311131322233. The reversal of 311131322231 is 132223131113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 311131322231 - 2³⁰ = 310057580407 is a prime.

It is a super-2 number, since 2×311131322231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311131322197 and 311131322206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311131322233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1814021 + ... + 1978113.

It is an arithmetic number, because the mean of its divisors is an integer number (40938991590).

Almost surely, 2^311131322231 is an apocalyptic number.

311131322231 is a deficient number, since it is larger than the sum of its proper divisors (16380610489).

311131322231 is a wasteful number, since it uses less digits than its factorization.

311131322231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263905.

The product of its digits is 648, while the sum is 23.

Adding to 311131322231 its reverse (132223131113), we get a palindrome (443354453344).

The spelling of 311131322231 in words is "three hundred eleven billion, one hundred thirty-one million, three hundred twenty-two thousand, two hundred thirty-one".