321330345 has 64 divisors (see below), whose sum is σ = 642318336. Its totient is φ = 133770240.

The previous prime is 321330329. The next prime is 321330403. The reversal of 321330345 is 543033123.

It is a happy number.

It is not a de Polignac number, because 321330345 - 2⁴ = 321330329 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 52432 + ... + 58238.

It is an arithmetic number, because the mean of its divisors is an integer number (10036224).

Almost surely, 2^321330345 is an apocalyptic number.

321330345 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

321330345 is a deficient number, since it is larger than the sum of its proper divisors (320987991).

321330345 is a wasteful number, since it uses less digits than its factorization.

321330345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5870.

The product of its (nonzero) digits is 3240, while the sum is 24.

The square root of 321330345 is about 17925.6895264868. The cubic root of 321330345 is about 684.9369256573.

Adding to 321330345 its reverse (543033123), we get a palindrome (864363468).

The spelling of 321330345 in words is "three hundred twenty-one million, three hundred thirty thousand, three hundred forty-five".