321554000189 has 2 divisors, whose sum is σ = 321554000190. Its totient is φ = 321554000188.

The previous prime is 321554000143. The next prime is 321554000263. The reversal of 321554000189 is 981000455123.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 287421437689 + 34132562500 = 536117^2 + 184750^2 .

It is a cyclic number.

It is not a de Polignac number, because 321554000189 - 2⁸ = 321553999933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321554080189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160777000094 + 160777000095.

It is an arithmetic number, because the mean of its divisors is an integer number (160777000095).

Almost surely, 2^321554000189 is an apocalyptic number.

It is an amenable number.

321554000189 is a deficient number, since it is larger than the sum of its proper divisors (1).

321554000189 is an equidigital number, since it uses as much as digits as its factorization.

321554000189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 38.

The spelling of 321554000189 in words is "three hundred twenty-one billion, five hundred fifty-four million, one hundred eighty-nine", and thus it is an aban number.