321552242255261 has 4 divisors (see below), whose sum is σ = 321769067774112. Its totient is φ = 321335416736412.

The previous prime is 321552242255219. The next prime is 321552242255327. The reversal of 321552242255261 is 162552242255123.

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 a de Polignac number, because none of the positive numbers 2^k-321552242255261 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 (321552242255561) 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, 108412757201 + ... + 108412760166.

It is an arithmetic number, because the mean of its divisors is an integer number (80442266943528).

Almost surely, 2^{321552242255261} is an apocalyptic number.

It is an amenable number.

321552242255261 is a deficient number, since it is larger than the sum of its proper divisors (216825518851).

321552242255261 is a wasteful number, since it uses less digits than its factorization.

321552242255261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216825518850.

The product of its digits is 2880000, while the sum is 47.

The spelling of 321552242255261 in words is "three hundred twenty-one trillion, five hundred fifty-two billion, two hundred forty-two million, two hundred fifty-five thousand, two hundred sixty-one".