321312032 has 24 divisors (see below), whose sum is σ = 637572096. Its totient is φ = 159388992.

The previous prime is 321312011. The next prime is 321312037. The reversal of 321312032 is 230213123.

It is a self number, because there is not a number n which added to its sum of digits gives 321312032.

It is not an unprimeable number, because it can be changed into a prime (321312037) 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, 35468 + ... + 43595.

It is an arithmetic number, because the mean of its divisors is an integer number (26565504).

Almost surely, 2^321312032 is an apocalyptic number.

321312032 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

321312032 is a deficient number, since it is larger than the sum of its proper divisors (316260064).

321312032 is a wasteful number, since it uses less digits than its factorization.

321312032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79200 (or 79192 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 321312032 is about 17925.1787159850. The cubic root of 321312032 is about 684.9239136191.

Adding to 321312032 its reverse (230213123), we get a palindrome (551525155).

The spelling of 321312032 in words is "three hundred twenty-one million, three hundred twelve thousand, thirty-two".