312302321 has 4 divisors (see below), whose sum is σ = 312483444. Its totient is φ = 312121200.

The previous prime is 312302279. The next prime is 312302329. The reversal of 312302321 is 123203213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 82446400 + 229855921 = 9080^2 + 15161^2 .

It is a cyclic number.

It is not a de Polignac number, because 312302321 - 2¹⁸ = 312040177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 312302321.

It is not an unprimeable number, because it can be changed into a prime (312302329) 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, 87950 + ... + 91431.

It is an arithmetic number, because the mean of its divisors is an integer number (78120861).

Almost surely, 2^312302321 is an apocalyptic number.

It is an amenable number.

312302321 is a deficient number, since it is larger than the sum of its proper divisors (181123).

312302321 is a wasteful number, since it uses less digits than its factorization.

312302321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181122.

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

The square root of 312302321 is about 17672.0774387167. The cubic root of 312302321 is about 678.4612850707.

Adding to 312302321 its reverse (123203213), we get a palindrome (435505534).

The spelling of 312302321 in words is "three hundred twelve million, three hundred two thousand, three hundred twenty-one".