321056647243 has 4 divisors (see below), whose sum is σ = 321308063280. Its totient is φ = 320805231208.

The previous prime is 321056647229. The next prime is 321056647267. The reversal of 321056647243 is 342746650123.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 321056647243 - 2¹⁷ = 321056516171 is a prime.

It is a super-2 number, since 2×321056647243² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 321056647243.

It is not an unprimeable number, because it can be changed into a prime (321056647943) 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, 125706103 + ... + 125708656.

It is an arithmetic number, because the mean of its divisors is an integer number (80327015820).

Almost surely, 2^321056647243 is an apocalyptic number.

321056647243 is a deficient number, since it is larger than the sum of its proper divisors (251416037).

321056647243 is a wasteful number, since it uses less digits than its factorization.

321056647243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251416036.

The product of its (nonzero) digits is 725760, while the sum is 43.

The spelling of 321056647243 in words is "three hundred twenty-one billion, fifty-six million, six hundred forty-seven thousand, two hundred forty-three".