311424321 has 8 divisors (see below), whose sum is σ = 447173440. Its totient is φ = 191645712.

The previous prime is 311424317. The next prime is 311424353. The reversal of 311424321 is 123424113.

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

It is not a de Polignac number, because 311424321 - 2² = 311424317 is a prime.

It is a super-4 number, since 4×311424321⁴ (a number of 35 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (311424391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3992581 + ... + 3992658.

It is an arithmetic number, because the mean of its divisors is an integer number (55896680).

Almost surely, 2^311424321 is an apocalyptic number.

It is an amenable number.

311424321 is a deficient number, since it is larger than the sum of its proper divisors (135749119).

311424321 is a wasteful number, since it uses less digits than its factorization.

311424321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7985255.

The product of its digits is 576, while the sum is 21.

The square root of 311424321 is about 17647.2185060422. The cubic root of 311424321 is about 677.8248845090.

Adding to 311424321 its reverse (123424113), we get a palindrome (434848434).

The spelling of 311424321 in words is "three hundred eleven million, four hundred twenty-four thousand, three hundred twenty-one".