321311864 has 16 divisors (see below), whose sum is σ = 613827720. Its totient is φ = 157624480.

The previous prime is 321311813. The next prime is 321311897. The reversal of 321311864 is 468113123.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378482 + ... + 379329.

Almost surely, 2^321311864 is an apocalyptic number.

It is an amenable number.

321311864 is a deficient number, since it is larger than the sum of its proper divisors (292515856).

321311864 is a wasteful number, since it uses less digits than its factorization.

321311864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757870 (or 757866 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 321311864 is about 17925.1740298386. The cubic root of 321311864 is about 684.9237942468.

Adding to 321311864 its reverse (468113123), we get a palindrome (789424987).

The spelling of 321311864 in words is "three hundred twenty-one million, three hundred eleven thousand, eight hundred sixty-four".