321771313645243 has 32 divisors (see below), whose sum is σ = 409204733690880. Its totient is φ = 245719617586560.

The previous prime is 321771313645237. The next prime is 321771313645289. The reversal of 321771313645243 is 342546313177123.

It is a cyclic number.

It is not a de Polignac number, because 321771313645243 - 2³⁷ = 321633874691771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321771313642243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41373183 + ... + 48531256.

It is an arithmetic number, because the mean of its divisors is an integer number (12787647927840).

Almost surely, 2^{321771313645243} is an apocalyptic number.

321771313645243 is a deficient number, since it is larger than the sum of its proper divisors (87433420045637).

321771313645243 is a wasteful number, since it uses less digits than its factorization.

321771313645243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89905387.

The product of its digits is 7620480, while the sum is 52.

The spelling of 321771313645243 in words is "three hundred twenty-one trillion, seven hundred seventy-one billion, three hundred thirteen million, six hundred forty-five thousand, two hundred forty-three".