321250544513 has 4 divisors (see below), whose sum is σ = 329932991700. Its totient is φ = 312568097328.

The previous prime is 321250544473. The next prime is 321250544557. The reversal of 321250544513 is 315445052123.

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 201307460929 + 119943083584 = 448673^2 + 346328^2 .

It is a cyclic number.

It is not a de Polignac number, because 321250544513 - 2²⁴ = 321233767297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321250544213) 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, 4341223538 + ... + 4341223611.

It is an arithmetic number, because the mean of its divisors is an integer number (82483247925).

Almost surely, 2^321250544513 is an apocalyptic number.

It is an amenable number.

321250544513 is a deficient number, since it is larger than the sum of its proper divisors (8682447187).

321250544513 is an equidigital number, since it uses as much as digits as its factorization.

321250544513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8682447186.

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 321250544513 its reverse (315445052123), we get a palindrome (636695596636).

The spelling of 321250544513 in words is "three hundred twenty-one billion, two hundred fifty million, five hundred forty-four thousand, five hundred thirteen".