311321004 has 48 divisors (see below), whose sum is σ = 771724800. Its totient is φ = 97402176.

The previous prime is 311320991. The next prime is 311321011. The reversal of 311321004 is 400123113.

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 15 ways as a sum of consecutive naturals, for example, 18589 + ... + 31115.

It is an arithmetic number, because the mean of its divisors is an integer number (16077600).

Almost surely, 2^311321004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 311321004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (385862400).

311321004 is an abundant number, since it is smaller than the sum of its proper divisors (460403796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

311321004 is a wasteful number, since it uses less digits than its factorization.

311321004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12662 (or 12660 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 311321004 is about 17644.2909747034. The cubic root of 311321004 is about 677.7499186455.

Adding to 311321004 its reverse (400123113), we get a palindrome (711444117).

The spelling of 311321004 in words is "three hundred eleven million, three hundred twenty-one thousand, four".