311489321 has 32 divisors (see below), whose sum is σ = 378628992. Its totient is φ = 252495360.

The previous prime is 311489309. The next prime is 311489329. The reversal of 311489321 is 123984113.

It is a de Polignac number, because none of the positive numbers 2^k-311489321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311489329) 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 31 ways as a sum of consecutive naturals, for example, 552986 + ... + 553548.

It is an arithmetic number, because the mean of its divisors is an integer number (11832156).

Almost surely, 2^311489321 is an apocalyptic number.

It is an amenable number.

311489321 is a deficient number, since it is larger than the sum of its proper divisors (67139671).

311489321 is a wasteful number, since it uses less digits than its factorization.

311489321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713.

The product of its digits is 5184, while the sum is 32.

The square root of 311489321 is about 17649.0600599579. The cubic root of 311489321 is about 677.8720394137.

The spelling of 311489321 in words is "three hundred eleven million, four hundred eighty-nine thousand, three hundred twenty-one".