321343972 has 24 divisors (see below), whose sum is σ = 572886720. Its totient is φ = 157671840.

The previous prime is 321343963. The next prime is 321344003. The reversal of 321343972 is 279343123.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221353 + ... + 222799.

It is an arithmetic number, because the mean of its divisors is an integer number (23870280).

Almost surely, 2^321343972 is an apocalyptic number.

It is an amenable number.

321343972 is a deficient number, since it is larger than the sum of its proper divisors (251542748).

321343972 is a wasteful number, since it uses less digits than its factorization.

321343972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2451 (or 2449 counting only the distinct ones).

The product of its digits is 27216, while the sum is 34.

The square root of 321343972 is about 17926.0696194118. The cubic root of 321343972 is about 684.9466078050.

The spelling of 321343972 in words is "three hundred twenty-one million, three hundred forty-three thousand, nine hundred seventy-two".