321319964 has 12 divisors (see below), whose sum is σ = 642639984. Its totient is φ = 137708544.

The previous prime is 321319961. The next prime is 321319981. The reversal of 321319964 is 469913123.

321319964 is an admirable number.

It is a super-2 number, since 2×321319964² = 206493038529922592, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321319961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5737829 + ... + 5737884.

It is an arithmetic number, because the mean of its divisors is an integer number (53553332).

Almost surely, 2^321319964 is an apocalyptic number.

It is an amenable number.

321319964 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

321319964 is a wasteful number, since it uses less digits than its factorization.

321319964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11475724 (or 11475722 counting only the distinct ones).

The product of its digits is 34992, while the sum is 38.

The square root of 321319964 is about 17925.3999676437. The cubic root of 321319964 is about 684.9295496481.

The spelling of 321319964 in words is "three hundred twenty-one million, three hundred nineteen thousand, nine hundred sixty-four".