311213330 has 16 divisors (see below), whose sum is σ = 560655000. Its totient is φ = 124380672.

The previous prime is 311213323. The next prime is 311213341. The reversal of 311213330 is 33312113.

It can be written as a sum of positive squares in 4 ways, for example, as 261242569 + 49970761 = 16163^2 + 7069^2 .

It is a junction number, because it is equal to n+sod(n) for n = 311213299 and 311213308.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 32 + ... + 24948.

Almost surely, 2^311213330 is an apocalyptic number.

311213330 is a deficient number, since it is larger than the sum of its proper divisors (249441670).

311213330 is a wasteful number, since it uses less digits than its factorization.

311213330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26173.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 311213330 is about 17641.2394689262. The cubic root of 311213330 is about 677.6717737311.

Adding to 311213330 its reverse (33312113), we get a palindrome (344525443).

The spelling of 311213330 in words is "three hundred eleven million, two hundred thirteen thousand, three hundred thirty".