323216920261 has 4 divisors (see below), whose sum is σ = 323218420492. Its totient is φ = 323215420032.

The previous prime is 323216920253. The next prime is 323216920307. The reversal of 323216920261 is 162029612323.

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 249006988036 + 74209932225 = 499006^2 + 272415^2 .

It is a cyclic number.

It is not a de Polignac number, because 323216920261 - 2³ = 323216920253 is a prime.

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 323216920261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323216920211) 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, 358956 + ... + 880501.

It is an arithmetic number, because the mean of its divisors is an integer number (80804605123).

Almost surely, 2^323216920261 is an apocalyptic number.

It is an amenable number.

323216920261 is a deficient number, since it is larger than the sum of its proper divisors (1500231).

323216920261 is a wasteful number, since it uses less digits than its factorization.

323216920261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500230.

The product of its (nonzero) digits is 46656, while the sum is 37.

The spelling of 323216920261 in words is "three hundred twenty-three billion, two hundred sixteen million, nine hundred twenty thousand, two hundred sixty-one".