321613217057409 has 4 divisors (see below), whose sum is σ = 428817622743216. Its totient is φ = 214408811371604.

The previous prime is 321613217057389. The next prime is 321613217057423. The reversal of 321613217057409 is 904750712316123.

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 not a de Polignac number, because 321613217057409 - 2⁹ = 321613217056897 is a prime.

It is a super-2 number, since 2×321613217057409² (a number of 30 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (321613217057809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53602202842899 + ... + 53602202842904.

It is an arithmetic number, because the mean of its divisors is an integer number (107204405685804).

Almost surely, 2^{321613217057409} is an apocalyptic number.

It is an amenable number.

321613217057409 is a deficient number, since it is larger than the sum of its proper divisors (107204405685807).

321613217057409 is a wasteful number, since it uses less digits than its factorization.

321613217057409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107204405685806.

The product of its (nonzero) digits is 1905120, while the sum is 51.

The spelling of 321613217057409 in words is "three hundred twenty-one trillion, six hundred thirteen billion, two hundred seventeen million, fifty-seven thousand, four hundred nine".