321861223 has 2 divisors, whose sum is σ = 321861224. Its totient is φ = 321861222.

The previous prime is 321861179. The next prime is 321861283. The reversal of 321861223 is 322168123.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321861223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321861191 and 321861200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321861283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160930611 + 160930612.

It is an arithmetic number, because the mean of its divisors is an integer number (160930612).

Almost surely, 2^321861223 is an apocalyptic number.

321861223 is a deficient number, since it is larger than the sum of its proper divisors (1).

321861223 is an equidigital number, since it uses as much as digits as its factorization.

321861223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 28.

The square root of 321861223 is about 17940.4911582710. The cubic root of 321861223 is about 685.3139186668.

The spelling of 321861223 in words is "three hundred twenty-one million, eight hundred sixty-one thousand, two hundred twenty-three".