321305053 has 8 divisors (see below), whose sum is σ = 324244440. Its totient is φ = 318377280.

The previous prime is 321304969. The next prime is 321305059. The reversal of 321305053 is 350503123.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 23639044 + 297666009 = 4862^2 + 17253^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321305053 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 (321305059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58443 + ... + 63703.

It is an arithmetic number, because the mean of its divisors is an integer number (40530555).

Almost surely, 2^321305053 is an apocalyptic number.

It is an amenable number.

321305053 is a deficient number, since it is larger than the sum of its proper divisors (2939387).

321305053 is a wasteful number, since it uses less digits than its factorization.

321305053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5807.

The product of its (nonzero) digits is 1350, while the sum is 22.

The square root of 321305053 is about 17924.9840446233. The cubic root of 321305053 is about 684.9189546611.

Adding to 321305053 its reverse (350503123), we get a palindrome (671808176).

The spelling of 321305053 in words is "three hundred twenty-one million, three hundred five thousand, fifty-three".