321264013 has 4 divisors (see below), whose sum is σ = 367158880. Its totient is φ = 275369148.

The previous prime is 321263963. The next prime is 321264017. The reversal of 321264013 is 310462123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321264013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321264017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22947423 + ... + 22947436.

It is an arithmetic number, because the mean of its divisors is an integer number (91789720).

Almost surely, 2^321264013 is an apocalyptic number.

It is an amenable number.

321264013 is a deficient number, since it is larger than the sum of its proper divisors (45894867).

321264013 is an equidigital number, since it uses as much as digits as its factorization.

321264013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45894866.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 321264013 is about 17923.8392371724. The cubic root of 321264013 is about 684.8897920626.

The spelling of 321264013 in words is "three hundred twenty-one million, two hundred sixty-four thousand, thirteen".