311131424 has 24 divisors (see below), whose sum is σ = 615183660. Its totient is φ = 154894336.

The previous prime is 311131417. The next prime is 311131427. The reversal of 311131424 is 424131113.

It can be written as a sum of positive squares in 2 ways, for example, as 255360400 + 55771024 = 15980^2 + 7468^2 .

It is a junction number, because it is equal to n+sod(n) for n = 311131396 and 311131405.

It is not an unprimeable number, because it can be changed into a prime (311131427) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 13409 + ... + 28320.

Almost surely, 2^311131424 is an apocalyptic number.

It is an amenable number.

311131424 is a deficient number, since it is larger than the sum of its proper divisors (304052236).

311131424 is a wasteful number, since it uses less digits than its factorization.

311131424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41972 (or 41964 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 311131424 is about 17638.9178806411. The cubic root of 311131424 is about 677.6123179934.

Adding to 311131424 its reverse (424131113), we get a palindrome (735262537).

The spelling of 311131424 in words is "three hundred eleven million, one hundred thirty-one thousand, four hundred twenty-four".