312032321 has 8 divisors (see below), whose sum is σ = 313438464. Its totient is φ = 310630320.

The previous prime is 312032317. The next prime is 312032323. The reversal of 312032321 is 123230213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 312032321 - 2² = 312032317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 312032321.

It is not an unprimeable number, because it can be changed into a prime (312032323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361136 + ... + 361998.

It is an arithmetic number, because the mean of its divisors is an integer number (39179808).

Almost surely, 2^312032321 is an apocalyptic number.

It is an amenable number.

312032321 is a deficient number, since it is larger than the sum of its proper divisors (1406143).

312032321 is an equidigital number, since it uses as much as digits as its factorization.

312032321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2071.

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

The square root of 312032321 is about 17664.4366171129. The cubic root of 312032321 is about 678.2657081670.

Adding to 312032321 its reverse (123230213), we get a palindrome (435262534).

The spelling of 312032321 in words is "three hundred twelve million, thirty-two thousand, three hundred twenty-one".